How to Prototype a Power Bank Charger Without Building Any Dedicated Hardware
The short answer to this question is yes, and, as this question has been asked by many customers over the years, this article was written to explore the topic in further detail. This article will review the process involved in developing an application using existing evaluation boards, discuss the challenges encountered, and outline recommendations for further revisions and improvements.
Introduction
Ideally, any power supply design should start with some basic proof of concept tests, which often involve testing an existing demo board. This demo simply takes this preexisting step (of testing single rails on the demo hardware) and expands on it to produce a working system using demo hardware. Furthermore, as this demo was needed within a relatively short time frame, the typical development process of design, layout, build, assemble, and test (plus any design iteration) was not possible, so the system was prototyped in its entirety using nothing but readily available hardware.
Application
To answer the question posed at the beginning of this article, it was necessary to choose a high level application as a starting point to prove this was possible. This led to the power bank charging application being selected as a proof of concept. As power management is a prerequisite for every electronic project, any other application could have been selected.
A power bank charger is a common enough application, which most consumers have encountered and used—for example, many travelers carry one to ensure their phone remains charged over a long journey. A power bank is essentially a battery pack (capacity varies depending on the price and range required), with one or more USB-A ports as well as a USB-C input port to charge it. It is possible of course to layer additional complexity on top of this basic functionality—for example, the addition of a wireless charging pad or an input to allow solar charging of the bank for outdoor enthusiasts.
For this application, the option to charge the battery via solar or to charge via a DC input from a standard 12 V AC-to-DC wall wart was included. The outputs included some basic USB-A charging ports (two in total), producing 5 V for use with mobile phones and a range of USB-powered electronics.
Power Source Selection—LTC4416
In this example, the design will support two input power sources (a solar panel and an AC-to-DC wall wart, which is just a simple AC-to-DC power supply). For this reason, a clever device called a power path prioritizer is required not only to intelligently switch between the available sources depending on which was available but also to manage the situation where they both were available by assigning priority to one source or the other. A simple version of this implementation can be achieved by using some simple diodes—commonly connecting the two cathodes of the diodes and connecting the anodes to their respective sources. Unfortunately, this particular configuration is lossy due to the diode drop inherent in a typical diode (approximately 0.6 V), but it also doesn’t allow for any clever selection criteria to be implemented, for example, priority selection. It simply allows the higher potential input to pass through.
Here LTC4416 comes into play—it not only replaces the lossy diodes with PFETs, which are far more efficient, but also allows for priority to be assigned. In this particular application, priority will always be assigned to the wall wart. This allows the design to take advantage of the available power (and higher current) when it is available. This device is exceptionally flexible, with many operational modes possible depending on the design requirements. Table 1 (sourced from the LTC4416 data sheet) displays the modes of operation.
| E1 | E2 | Operation Mode | IG(OFF)1 | IG(OFF)2 |
| 1 | 0 | Load sharing | Enabled | Enabled |
| 1 | Sense | V1 is less than V2 | Enabled | |
| Sense | 0 | V1 is greater than V2 | Enabled | |
| 0 | X | Channel 1 disabled Do not use | Disabled | |
| X | 1 | Channel 2 disabled Do not use | Disabled | |
| 0 | 1 | Both channels disabled | Disabled | Disabled |
Switching Buck Battery Charger—LTC4162-L
For the battery charger, the LTC4162-L was selected due to its wide input voltage range (up to 35 V) and 3.2 A charging capability, as well as the integrated FET design, which results in a small solution size. This is a commonly used, full-featured charger IC, which has great application flexibility as it comes in many battery chemistry variants such as LiFePO4, Li-Ion, lead acid, etc., as well as an I 2 C interface to allow the user to extract telemetry information. It was selected for this particular application not only because of the aforementioned flexibility on the input and battery voltage but also because of the integrated nature, which helps to keep the solution size to minimum. Another useful feature that it has is maximum power point tracking (MPPT)—if solar is one of the possible input sources for your design, MPPT is a must to ensure the design extracts as much available power as possible. The LTC4162 also has a built-in power path control that is useful in this application when the input source is removed, allowing the provision of the battery voltage to the output terminals for use downstream.
USB Charging Solution—CN0509
The board selected to provide the USB charging voltage for the connected device is from our Circuits from the Lab collection of reference designs and solutions. Typically, a single device is shown on an evaluation board to allow evaluation of that specific device. Circuits from the Lab boards, however, are a more solution-focused implementation that makes use of several Analog Devices’ products from different product portfolios to solve a particular system requirement.
The CN0509 was designed to be a wide input range, dual USB power charger. It was developed for use in emergencies such as natural disasters or extended power outages. An example power source that many would have available to them is a car battery. This board can be powered by a car battery to provide two 5 V ports, which are isolated from the primary voltage for safety. There is a range of alternative power sources that you may have available from stacks of loose batteries to motors to act as a simple generator. The CN0509 has a wide input voltage range so it will be able to run from any supply in the range of 5 V to 100 V. For all of the above reasons, this makes it an ideal candidate to pair up with the existing boards to provide the USB charging outputs required for the power bank charger.
Reverse polarity protection is included to protect the circuit from an incorrectly connected supply and an isolated flyback converter is utilized to isolate the charger outputs from the input source—this is particularly useful if a –48 V communication backup supply is used as a power source. This can result in a phone being charged to –48 V and creating a hazardous situation. Isolated conversion prevents this from occurring. Another note here is that the CN0509 board is quite small; much of this is attributed to the highly efficient ICs selected and the no-opto flyback LT8302. A key differentiation is that the flyback converter LT8302 does not need an isolated optical feedback path.
There are two USB ports on this particular board: one is a standard USB port (without D/D– connected) and the other port has a DCP controller to monitor the USB data line voltages so that it can enable fast charging and provide 5 V at 2 A max. Achieving this higher level of charge current is dependent on the input voltage utilized. 12 V is optimal based on the performance graph shown in Figure 4.
Power Sources
The primary power source selected was a 60 W AC-to-DC 12 V adaptor. This served as one input to the LTC4416 demo board, and a relatively small solar panel was purchased to provide an alternative input source—since this project was to be used at an indoor event and there was never going to be sufficient lighting available to provide a reasonable level of available power to run from solar, this feature was included simply to demonstrate the capability and functionality of the power path prioritizer.
This particular design was developed to be a power bank and as such it would require a battery pack to act as the storage element. Shipping restrictions in relation to batteries are prohibitive. The demo was developed specifically so that a generic battery pack could be bought and inserted to run the demo on its arrival. Based on this limitation, a rechargeable 2× series cell Li-Ion battery pack generating a nominal 7.4 V with a 2600 mAh capacity was selected to run the demo for the event. It is worth noting that a larger capacity battery could easily be installed here if required.
Demo Build
From a build perspective, the hardware was standard, so no electrical modifications were required beyond some adjustments of the LTC4416 thresholds to ensure the correct priority for the input power sources. In order to make it more visually appealing for the event, the boards were mounted on a simple black Perspex sheet using some standard metal standoffs.
The charge current that was being provided for the evening was monitored by a simple USB meter. This device visually represented how much current was available to charge the attendee’s phones.
How It Performed
The demo performed its core function effectively; it comfortably charged the battery pack from two alternate sources, the handover between sources was managed well by the power path prioritizer, and the CN0509 nicely provided charge to the connected USB devices. This particular power bank has another useful feature that many power bank chargers do not have and that is the ability to simultaneously charge the battery pack and charge the connected USB device. For example, my power bank, which many would consider reasonably high end, will not charge the phone and the bank itself at the same time, which is a frustrating limitation.
The charge current to the USB port is limited by the capability of the LTC4162 with its internal FET design providing a max of 3.2 A—the bulk of the current is sent to the battery during charging. The remaining current can be used through the USB charger ports.
Any time the input power source is removed, the power path FET on the LTC4162 demo board ensures that the battery power is redirected to the output port and hence maintains power to the CN0509 and USB ports. The available charge current in this mode drops as per the graph in Figure 4—since the input source to the CN0509 is now the battery voltage, which is a nominal 7.4 V.
Next Steps
Once the application has been proven to work using some simple, readily available demo boards, the next reasonable step is to develop a product prototype that takes learnings from the initial prototype work and integrates this into the end solution. Part of this would be to modify the existing schematics from the boards used to remove the superfluous items (test points, connectors, etc.). The user could then get started on the PCB development, which would then show off the importance and usability of the resources we provide with each of our devices. For example, the optimized demo board layout is a freely available resource provided for each of our devices. While the demo board generally looks to be quite large in size, this is simply to aid the testability and usability of the device. Closer inspection of the board layout reveals that the IC for which the board was developed and the enabling circuitry (resistors, capacitors, inductor, etc.) are all designed into as small a space as possible to allow customers to bring this into their own layout. This will then provide confidence to the customer as they know that this is a tested design, which they can verify on the bench before building their own version.
For the end application, a larger capacity battery with a higher voltage would help to optimize the amount of charge current provided to the USB ports.
The CN0509 is a fantastic design and fulfills its requirements perfectly; however, for this particular application, a more slimmed down design could be utilized to reduce the overall battery bank cost. For example, the LTC7103 and input polarity protection circuitry would not be necessary for this design and the isolated flyback could be powered directly from the output of the LTC4162 (either 12 V from the AC-to-DC wall wart or the battery voltage once mains power has been removed).
Conclusion
You can certainly prototype a power bank charger, or any other power supply design for that matter, using some readily available hardware and simple power sources. This highlights that using available demo board hardware can quickly provide a proof of concept for potential projects without spending much on development. Furthermore, this relatively small but valuable step will provide the user with confidence before committing to a more integrated design. Another point worth reiterating is that power supply design and, more specifically, the layout of a power design can be challenging so it is worth utilizing the resources available to reduce the overall development time.
Author
Diarmuid Carey is an applications engineer with the European Centralized Applications Center based in Limerick, Ireland. He has worked as an applications engineer since 2008 and joined Analog Devices in 2017, providing design support for the Power by Linear portfolio for European broad market customers. He holds a Bachelor of Engineering in computer engineering from University of Limerick.
Nokia Power Bank P6202
These Nokia-branded products are manufactured by, imported, distributed and sold by or on behalf of RichGo Technology (Shenzhen) Co. Ltd. under a brand license from Nokia. Nokia is not a manufacturer, importer, distributor or retailer of these products.
Features
Browse, talk and play for days
20000mAh capacity fully charges most phones up to seven times and larger-capacity tablets at least twice.
High-speed charging
Supports up to 22.5W superfast charge with PD20W fast-charge technology. Give your iPhone 12 a 60% charge in around half-an-hour or a full charge in around two hours.
Safety assured
Built-in Smart circuitry protects against overcharging, short-circuiting, and voltage instabilities.
Fuel your journey
Travel ready
Compact design and flight-friendly capacity make the P6202 the perfect travel companion.
Universal compatibility
Compatible with most devices including Nintendo Switch, iPhone, Galaxy, Google Pixel, HTC, LG, and true wireless earbuds.
Three at a time
Three built-in output charging ports allow you to charge three different devices simultaneously.
Choose your color
The Nokia Power Bank P6202 is available in two popular colors. Choose between blue and pink.
Frequently asked questions
The number of charges vary by smartphone manufacturer and the phone’s battery capacity. For example, the iPhone 12 with a capacity of 2851mAh can be charged approximately 5 times.
The charging time varies by smartphone manufacturer and the phone’s battery capacity. For example, an iPhone 12 can be charged to 60% in 30 mins and fully charged in about 2 hours.
The PD18W is a fast power delivery standard. It’s capable of recharging the power bank in approximately 5. 6 hours.
22.5W SCP is only compatible with certain Huawei and Honor models: Huawei Mate 20 Pro/ Mate 30/ Mate 40 Pro/ P20/ P30 Pro, etc.; Honor V10/ Note10/ Note20/ Note20 Pro/ V20, etc. Mobile phones must have the SCP superfast charging function to benefit from that charging protocol.
No, the phone has a number of built-in protection features to safeguard your phone e.g. protection against the charger over-heating, plus it will automatically power off as soon as the phone is fully charged.
Yes, its capacity is 20000mAh. The Civil Aviation Administration stipulates that power banks with a capacity under 27000mAh (where the rated energy is less than 100Wh) may be taken on a plane; power banks with a capacity over 27000mAh cannot be taken onboard (Please check with your airline before you travel).
Nokia Power Bank P6202 supports: SCP/ FCP/VOOC/PD3.0/QC3.0/BC1.2 The Nokia Power Bank P6202 supports fast charging for 98% of mobile phones on the market (these must be charged via fast-charge cables) Mobile Phones supported: Huawei P40, P40 Pro, P30, P30 Pro, Mate 30, Mate 30 Pro, Mate 20, Mate 20 Pro, Nova 7, Nova 6. Honor 30 Pro, 30, 20 Pro, 20, V30 Pro, V20. Apple iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max, iPhone X, iPhone XR, iPhone XS, iPhone XS Max, iPhone 8. Xiaomi 10, 10 Pro, 9, 9 Pro, 8, Note 7 Pro. Samsung S20, S20, S10, S10, S9, Note10. This test list refers to the supported product models and software versions. If a model is not shown in this list, it does not mean that charging is not supported. The actual test and use results shall prevail.
Please do not use this power bank under high temperature or high-humidity conditions. Don’t use worn or damaged cables to connect the power bank to your devices. Stop using it immediately if it starts to swell.
The Type-C port has been making rounds in the gadget market for a while now, and almost all Android flagship smartphones these days feature this modern USB port only. Thus, the need for type c power bank with type C output surged.
Type c power bank have become a lot more popular standard for charging and connectivity with iPhones, iPads, Androids, and laptops. A USB-C power bank generally features two ports, one for charging the power bank and the other one for charging your devices. Finding a power bank with Type-C output in India was a surprisingly difficult task, but we managed to find a few models.
Listed here are some of the best USB Type C power banks that ensure your smartphone does not run out of battery:
Redmi 20000mAh Li-Polymer Power Bank
The top pick of our list here is the Redmi 20000mAh Li-Polymer Power Bank that provides exceptional power to your modern mobile phone. This Redmi Power Bank comes with high-density advanced Li-polymer batteries that makes it more durable and optimizes charging efficiency. In a single charge, it can charge Redmi K20 Pro. 3.5 times, iPhone XS. 4.7 times, Redmi Note 7. 3.5 times and a lot other smartphones. The portable charger has dual input ports (Micro-USB/USB-C) and Dual USB output with Smart charging feature.
It intelligently adjusts power output up to 18W to deliver fast and efficient charging for each connected device. This power bank is crafted using high quality material and comes in classic black and white colours. The anti-slip edge texture offers a great hand feel and prevents pesky falls and drops.
Ambrane USB Type C 10000mAh Power Bank
Keep your devices charged on-the-go with this compact Ambrane USB Type C 10000mAh Power Bank. This sleek power bank will conveniently slip in your backpack or laptop bag and weighs really less, adding on to its portability factor. Tuned to support healthier battery function and faster USB charging speeds, the Aukey USB Type C power bank intelligently adjusts power output to match the unique charging needs of all your USB-powered gear.
With up to 2.4A of dedicated adaptive output per green AiPower USB port, your devices will each receive the safest maximum recharge rate possible. It also has a special mode to charge low-current devices (below 60mA), such as Bluetooth headphones and fitness trackers.
URBN 20000 mAh Premium Black Edition Nano Power Bank
The URBBN Type C 20000mAh Power Bank charges your devices up to 70% faster than a normal 5W charger. This means, using this power bank your smartphone will juice up faster than ever. With stock lightning to Type C Cable, you can charge your iPhone up to 50% in 30 minutes using the 18W Power Delivery Type C Port. This power bank is compact and concise, with 2 Output options, along with a normal USB A Output port.
The Stuffcool power bank is unsurprisingly light and compact, and its build quality and overall feel are really premium. Its LED light turns on when Quick Charging is being used to charge a device or the power bank itself, or if you are in USB Power Delivery mode.
Ambrane 27000mAh Li-Polymer Power Bank
The Ambrane 27000mAh Li-Polymer Power Bank is one of the highest capacity power banks available in the market. It comes with a large 27,000 mAh battery giving it enough juice to power up even the largest smartphones out there. This power bank is specifically built for long journeys to places where electricity might not be readily available.
It also contains great safety features and temperature resistance. This is great for traveling as you only need one cable to charge both your device and the power bank.
Mi Wireless Power Bank 10000mAh
The Mi Wireless Power Bank 10000mAh is designed for unprecedented convenience and is Qi certified that will charge your smartphone in no time. Since this power bank is wireless, you can absolutely forget the hassle of plugging and unplugging cords. In fact you can simultaneously charge two mobile devices at the same time or even the power bank itself. This power bank supports 18W Fast Charge on both the USB-A output port and the USB-C input port making it a reliable travel companion.
Lightweight and svelte, this Mi Power Bank is quite the looker and its non-skid wireless charging surface looks smooth while offering absolute charging comfort.Using high-quality lithium-ion polymer batteries and compatible with mainstream smartphones and digital devices, this wireless power bank offers seamless power supply. With a capacity of 10,000mAh, it can continuously charge your mobile devices on the go.
DISCLAIMER: The Times of India’s journalists were not involved in the production of this article.
WiBa: 100% Wireless Stackable Power Bank Fast Charging Pad
CHARGE PHONE POWER BANK AT THE SAME TIME – 100% WIRELESSLY: The Avido WiBa power bank (5000mAh) charges your Qi enabled devices wirelessly and includes an all-in-one charging pad for a true cord cutting experience.
WAKE UP IN THE MORNING READY TO GO: Just place your power bank on the included charging pad and your power bank instantly begins to charge. Then, place your Qi-enabled wireless charging phone on top of the power bank. Everything charges simultaneously for complete hassle free charging.
OPTIONAL METAL PLATE KEEPS PHONE ATTACHED TO WIBA: We include two slim metal plates (black silver) that easily attach to the back or case of your phone. With these plates, your phone will stay magnetically attached to the power bank and will not slide off.
FAST CHARGING (10W) PAD: The Avido WiBa charging pad charges the power bank without plugging in a cord. It also serves as a traditional wireless charging pad that can charge your Qi enabled device 100% wirelessly.
THE ONLY ALL-IN-ONE CHARGING SOLUTION WITH 100% WIRELESS CHARGING
WiBa Wirelessly Charges your Phone AND Power Bank – at the same time.
- Charge your power bank and phone simultaneously
- 100% wireless, no cables
- Up to 2x charges on-the-go
- Charges all Qi devices
- No adapters or cases required
- Charges up to two devices at once
Say goodbye to cables forever. WiBa is a patent pending, award-winning product. No competitor does what WiBa can.
Charge Your Phone and WiBa Power Bank at the Same Time!
Stack the power bank on the charging pad and your phone on the bank to charge both at the same time. Charge your Qi device and power bank 100% wirelessly.
It’s a Better Wireless Experience with WiBa
Ready for the Day Ahead
Place the Avido WiBa on the included charging dock and your power bank instantly begins to charge. Then, place your Qi-enabled wireless charging phone on top of the power bank. That’s it.
Fast Charging (10W) Pad Included
Not only does the charging dock serve to charge the power bank, but it also works as a traditional Qi wireless charging pad. Fast Charge compatible.
Keep Your Phone Attached to WiBa Power Bank with Optional Metal Plates
We include two slim metal plates (black silver) that easily attach to the back or case of your phone. With these plates, your phone will stay magnetically attached to the power bank and will not slide off.
WiBa’s metal plates integrate seamlessly with phone cases of all sizes, securing your phone to the power bank while you’re on-the-go.
Built for On-The-Go
Traveling? Just plug the USB Type-C cable into the power bank and charge WiBa and your phone wherever you go
WiBa becomes a portable wireless charging pad and power bank – all in one!
Loaded With Power
We’ve packed WiBa with 5000mAh of capacity. That’s loads of power to keep you going all day and night long.
On average, you can expect to charge your phone 1-2x. That’s the perfect amount for everyday use.
Battery Level
We’ve packed WiBa with 5000mAh of capacity. That’s loads of power to keep you going all day and night long.
This includes power levels at 25%, 50%, 75%, and 100%. A separate LED light indicates the wireless output function is active.
Emergency Backup Ready
Leave WiBa in your purse or briefcase and always be prepared in case your phone runs low on battery.
Weighing just 5.3oz and fitting in the palm of your hand, WiBa is the perfect companion for wherever you go!
The Total Package.
We include everything you need to get started – and we mean everything:
- WiBa 5000mAh 100% Wireless Power Bank
- WiBa Fast Charging (10W) Pad
- USB Type-C Cable
- QC 3.0 AC Adapter (USA Plug)
- Two Slim Metal Plates (Black Silver)
Device Compatibility: WiBa Stackable 2-in-1 Wireless Charging System is compatible with Qi wireless charging equipped devices and all USB powered devices including:
- Apple iPhone: 8, 8 Plus, X, XS, XS Max, XR, 11, 11 Pro, 11 Pro Max
- Samsung Galaxy: S10, S9, S9, Note 9, 8, S8, S8, S7, S7 Edge, Note 5, S6, S6 Edge
- LG: V30, G6 (US version only), G4 (optional), G3 (optional)
- Microsoft Lumia: 1520, 1020, 930, 929, 928, 920
- Google Nexus: 4, 5, 6, 7 (2013)
- BlackBerry: Priv
- All other devices using the Qi-wireless charging standard
Anti-Slip Plates:
Use the optional anti-slip plate to keep your phone magnetically attached to the power bank. With the 2 complimentary extra thin plates (Silver and Black), your phone stays securely attached for a better wireless charging experience.
Case Compatible:
WiBa power bank and charging pad work great with most cases up to up to 3mm in thickness. The included metal plates integrate seamlessly with phone cases of all sizes, securing your phone to the power bank while you’re on-the-go. The plates even work through thick cases, such as the OtterBox Defender Series.
Charging Pad-
- Size: 2.81″ x 5.47″ x.39″
- Weight: 5.7oz
- Charging Technology: Qi Output
- Input Type: USB Type-C
- Max Input: 5V/2.1A
- Wireless Output: 9V/10W
- Size: 2.81″ x 5.47″ x.57″
- Weight: 5.3oz
- Charging Technology: Qi Output
- Input Type: USB Type-C
- Max Input: 5V/2A
- Capacity: 5000mAh / 18.5Wh
- Number of USB Charging Ports: 1
- Wireless Output: 5V/5W
- Wired Output: 5V/2.1A
The Avido Difference.
At Avido, we dare to challenge what’s possible. Our team is just like you – power hungry and constantly on-the-go. We know how important it is to keep your mobile life moving, and we work tirelessly to create products that do just this.
Based in Washington, D.C., our products are designed in the USA and we have 100% USA-based customer support. We’ve dedicated ourselves to create products that not only look great but are also functional and durable. With years of experience, Avido has become an award-winning company with retail sales around the world.
Does WiBa work with phone cases?
You shouldn’t have an issue charging your phone while it’s secured in its case, as long as it’s the case is not thicker than 3mm. Please note that metal cases are not compatible with wireless charging.
What type of wall plug is included with WiBa?
WiBa includes a Type A (USA, Mexico, and Canada) QC 3.0 AC wall plug. The wall plug supports 100-240V. Please note: For use in other countries, an adapter may be required.
What makes WiBa different?
The Avido WiBa creates a better charging experience.
This means to charge the power bank, simply lay it on top of the included charging pad. Just like that, WiBa power bank begins to charge.
Then, take your wireless charging device, and place it on top of the power bank. Both the power bank and your device will be charging at the same time. There are no cords to mess with, no tangles, and no hassle.
What devices are compatible with WiBa?
WiBa is compatible with any device using the Qi wireless charging standard. Devices that work with WiBa include:
- Apple iPhone 11
- Apple iPhone 11 Pro
- Apple iPhone XS
- Apple iPhone XS Max
- Apple iPhone XR
- Apple iPhone X
- Apple iPhone 8
- Apple iPhone 8 Plus
- Samsung Galaxy S6
- Samsung Galaxy S7
- Samsung Galaxy S7 Edge
- Samsung Galaxy S7 Active
- Samsung Galaxy S8
- Samsung Galaxy S8 Active
- Samsung Galaxy S9
- Samsung Galaxy S10
- Samsung Galaxy Note 8
- Samsung Galaxy Note 9
- LG v30
- LG G6 (U.S. Versions)
- Moto Z (with Mod)
- and many more devices!
Note: It’s important to check with your device manufacturer to confirm Qi compatibility.
PLEASE NOTE: Sensors in phones such as the LG G6 and Droid 2 Turbo will lock the screen if they detect magnets. The Avido WiBa can still charge these devices, but the screen may be unusable when charging.
Can I use WiBa if my device doesn’t have Qi?
Yes! The Avido WiBa power bank is packed with a 2.1A output USB port that can support a wired device.
Also, you can take advantage of charging WiBa power bank on the included charging pad (without plugging in a cord to charge), and take it with you wherever you go.
Can I use my own Qi pad to charge WiBa?
WiBa charging pad uses a patent pending technology to charge the power bank. This allows WiBa to achieve quick charging results and enough power to simultaneously charge your power bank and wireless device. WiBa power bank can only be wirelessly charged by the included charging pad.
The charging pad has Qi Fast Charge output (10W) and you can place your wireless device right on top of the charging pad – no power bank needed.
WiBa power bank can also be charged directly using the included USB-C cable. Just plug the cable into the power bank and, if desired, place your wireless charging device on top. It’s perfect for on-the-go and you can leave your charging dock at home!
Can I stack more than one WiBa?
WiBa power bank does not have Qi input, so it cannot be stacked with another WiBa. WiBa power bank can only charge by placing it on the included charging dock, or by the traditional method of plugging in a USB-C cable (included).
Can my phone slide off of WiBa?
We include two slim metal plates (black white) that easily attach to the back or case of your phone. These metal plates are optional and are not required to use WiBa.
With these plates, your phone will stay magnetically attached to the power bank and will not slide off. If using a case, we strongly recommend making sure it is slim and supports wireless charging pass through.
Does WiBa charge as quickly as using a cord?
Charging times will vary with both wired and wireless charging depending on external conditions. With WiBa, we’ve engineered our product to produce the most efficient wireless output.
WiBa’s charging dock has Fast Charge capability and can charge devices with up to 9V/10W of power. WiBa power bank can charge devices with up to 5V/5W of power.
Disclaimer: Qi is a trademark of the Wireless Power Consortium. This product is not authorized, endorsed by or in any way connected to the Wireless Power Consortium.
WiBa 100% Wireless Charging Power Bank, WiBa 100% Wireless Charging Power Bank Extra Charging Pad