Input: AC 100-240V 50/60Hz Output: 42V 2A Indication Light: Green(full), Red(charging) Working Temp/humidity:-10°C-50°C,20%-90%RH Storage Temp/humidity:-10°C-60°C,20%-90%RH Package include: 1 x 42V 2A 10S battery charger 1 x Power cord Use of the charger : 1.Please charge the battery in dry environment. 2.Do not always connect the power supply when the charger is not in operation. 3. Please do not overcharge. When the ligth is green, please remove the charge. 4. Charging the battery before you draining it all the way to 0%. Otherwise the battery cannot be protected, or even get damaged. 5. Charge before use if the battery is not in operation for a long time (2-3 months). Make sure your battery is not damaged. 6. Keep long-term shallow discharging, and make sure deep discharge about every 3 months, it's so-called re-lighting, which is conducive to the activation of long-term immobile material in the deep part of the battery. Luminous means that the controller battery is with with undervoltage protection. 7.Please confirm your battery type, the charger is special for lithium battery. Do not use the charger on the LiFepo4 battery, otherwise the charger will get quite hot. 8. When charging, connect the battery to the charger cable, then connecting charger to AC power; after fully charged, disconnetct the power, then pulling out battery plug. The device may get damaged if you disconnect the battery plug while charging, especially when the charging current is large (the LED indicator is red).