Like other simple, single-cell lithium-ion battery chargers, Microchip’s MCP73812 provides no means of indicating the charging status. You can remedy this situation by adding four components (Figure 1 ...

Ryobi 4V USB Lithium batteries are really convenient and easy to recharge and have a really easy way to see if they are fully ...

The AN971 IC draws current from a USB port to recharge Li-Ion or Li-Polymer batteries. There is also a “Suspend” mode feature to conserve power. To view the application note, click on the URL below.

The highest-rated Harbor Freight battery chargers come from Cen-Tech and Viking, with a 4-amp Viking charger topping the list.