Product details:

This Duo LCD Charger from Watson charges 1 or 2 BP_511, BP_511A, BP_512, BP_514, BP_522 or BP_535 lithium_ion batteries via the included dedicated plates. These can be replaced by optional plates for various other batteries. The Duo can even simultaneously charge 2 different batteries with different voltages. It runs on 100_240VAC power, allowing for use all over the world. Charging time is between 2 and 6 hours, and the charger also features a USB 2.0 port for charging another device simultaneously. The LCD screen provides a digital read_out of each battery's charge percentage__even when the charger is unplugged__via the test button. The Duo includes a power cord with a 2_prong US plug, as well as a 12VDC car charger that plugs into a cigarette lighter.Input Power_ 100_240 VAC, 50 _ 60 Hz, 12 _ 24 VDC, 2.0 AOutput Power_ 1.2_8.4 VDC, 2.0 A _max. _, USB 2.0 port_ 5.0 VDC, 2.0 A _max. _Charging Time_ 2_6 hrInterface_ USB 2.0 port for charging another deviceOperating Temperature_ 32 to 104 F _0 to 40 C_Storage Temperature_ _4 to 140 F __20 to 60 C_Dimensions_ Charger_ 4.9 x 4.5 x 1.75' _12.4 x 11.4 x 4.45 cm_, Cord length_ 4.7' _1.4 m_Weight_ 7.7 oz _218 g_