Surely you need yet another way to charge your ... explaining how the circuit works. Still want to add on the design? Throw in one of these Li-ion holders for quick battery swapping action.

Arduino developers and hobbyists looking ... s nominal voltage of 3.7V to 5V and a a lithium-polymer battery charging circuit. Watch the video after the jump to learn more about the EnergyShield ...

“The Qduino Mini is Arduino-compatible & 100% open ... a fuel gauge that can tell you when to charge the battery.” • Battery Charger Circuit – just plug in USB and it charges the battery ...

The latest addition to my collection is a cheap portable power supply module labeled by its seller as “18650 Battery Shield (V3) for Raspberry Pi & Arduino ... printed circuit board. The Micro USB ...

The following automatic battery-charger design is created with a circuit that could qualify as the simplest window comparator ever built around a single transistor (see the figure). It starts ...

and a battery charging circuit for tiny LiPo batteries. It was, effectively, a small Arduino clone with a little bit of extra circuitry that made it great for portable and wearable projects.