18th February 2014, 07:41 AM
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Join Date: Dec 2013
Why power bank doesn't work for your phone
Power banks have influenced our ways of charging gradually. As right now the battery capacity becomes one of the greatest problems for portable devices, lots of people bought power bank in order to extend the standby time by charging them. However, it turns out that doesnít work well for the devices. What are the problems?
1. Voltage and Current.
First we should understand that different devices have different charging voltage. Taking cell phone as an example, generally the voltage for lithium ion battery is 3.7, while iPhone is 5V. If doesnít boost the voltage, you canít use common lithium ion battery to charge iPhone.
2. Charge interface.
In order to make power bank suitable for various cell phone, power banks are configured with common cell phone interface. If your mobile phone charging interface does not match the one on power banks, of course it will not work. The way to solve this is to find another wire that matches.
3. Devices compatibility
Some devices have strict control on charging voltage and current. So power banks will not work on those devices. Before buying a power bank for your devices, you have to know exactly about your intend-to-charge devices.
Judging from the above three points, most of power banks are compatible for all devices, except for some special one. The voltage is around 5V, when designing power bank circuit boards, 3.7 V batteries are adopted, and then use the MUC, IC to boost, in order to finish full charging process.
Additionally, we can also use wireless charging power bank to avoid all those three points mentioned above. Now most of the wireless power bank are using Qi standard, even though some cell phone is not Qi enabled, Solgo Technology Co., Ltd have published Qi receiver for cell phone, including Samsung S4, iPhone 4/4s, 5/5s, etc. Wireless charging era will come very soon.