lithium-ion battey

In a Nutshell Our choice for the best 18650 battery is the Orbtronic cell. This battery has a high capacity (3100 mAh), and maintain their voltage until fully drained. A two-pack of these cells is available at Amazon for around $30. Also available are Panasonic 18650 cells, with a bit more capacity (3400 mAh). If […]