USB Li-ion battery charger

This is a charger for lithium ion batteries which takes its power from the USB port of a computer. It uses the MCP73861 or MCP73863 Li-ion battery charger chip manufactured by Microchip. The circuit board is a piece of single sided copper clad board. A hole is cut inside it so that it will accommodate the integrated circuit.

The MCP73861 or MCP73863 (they are similiar, with only slight differences which do not affect the circuit connections) is available in a small leadless package.

The difficulty? There are no leads to solder to. The advantage? There are no leads to break!

Read More Source:
http://www.instructables.com/id/USB-Li-ion-battery-charger/

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