charger output must be above 4V and can deliver a maximum current of 500mA. This charger circuit will step up the voltage from 1.5V to 5V DC to reach the cell phone charging requirement. The circuit ...

Here is presented a simple 500mA 4.1V or 4.2V Li-ion battery charger that is constructed with the MCP73826 ... The IC operates with input voltage between 4.5V to 5.5V. Typical applications are: ...

The charger itself contains a 1300 mAh Li-ion battery which is said to take around ... charge indicator The Window solar charger outputs 5V/500mA via the included mini-USB cable, and has over ...

Sanyo introduced the KBC-L2 Eneloop Mobile Booster rechargeable battery pack, which provides instant back ... and RIM Blackberry Curve. The L2 provides 5V 500mA output power for charging two devices ...

In the beginning, USB could deliver up to 500mA of power at 5V, which worked out well enough ... batteries ballooned in size (we covered the growth of battery capacity in a previous article).