Magicshine MJ-6072 Charger Bike Light Batteries | Round Connector 8.4V 2.5A Wall Charger, Compatible with MJ-6102 Battery Pack, Default for MJ-906 This Charger has an input rating of 110V - 240V, 50 - 60 Hz, Output is 8.4V DC, 2.5A. Works with MagicShine High Capacity 6 cells Li-ion battery packs(MJ-6036/MJ-6102), also works with many other Li-ion battery packs The charger has an overcharge protection circuit When plugged into the wall the LED light on the charger displays red during charging and changes to green when the battery is fully charged