This half-inch square ultra-low power energy harvesting LiPo cell charger by [Kris Winer] uses a low voltage solar panel to top up a small lithium-polymer ... features like battery health ...

Rechargeable coin cell batteries are great for all your small projects ... The circuit on this coin cell charger is built from an MCP73831, a nice single cell, lithium ion and lithium polymer ...

So although only a small amount of current ... and while many battery chargers on the market today are compatible with lead acid, gel, and lithium-ion batteries (including all the ones featured ...