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I love neelandan’s electronics they’re gritty –

“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.”Link.

Related:

  • HOW TO – Vehicular 5V power – Link.
  • Minty Boost kit – Link.