... 3.6 V lithium ion rechargeable batteries, 1.2 V, 9V nimh/nickel every stop charging.2, Vmax detection, current, protect cells ... battery charger can also support for 2 9V battery recharging, support bigger size batteries, lithium batteries can charge.Technical parameters* packaging: plastic ... batteries, large (# 1 / D), 2, 2/3-5/4AA (# 5), 2/3-5/4AAA (7), 2/3-7, etc 5F6 / F8 rechargeable battery.3 2 9V ...