Use and maintenance of the charger : 1. When charging, first connector to the battery, then connect to AC; after full, cut off AC, then pull the battery plug. If you pull the battery plug first while charging, especially when the charging current is large (red light), it is very easy to damage the charger. 2. When the LED light turns green, please continue charging for 2-3 hours. 3. Please do not run out of battery power, then charger. Otherwise the battery cannot be protected or even . 4. long-term shallow discharge battery, about 3 months, for a deep discharge, is the 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 riding the controller battery undervoltage protection action. 5.Please use the charger in a dry place in time. 6.When you do not use the charger, do not always connect the power supply. 7.Please confirm your battery, Because it is used to charge the lithium battery. Do not use the charger on the LiFepo4 battery, otherwise the charger will be got incredibly hot. and high quality Super strong protection. Output: 42V 1.5-2A Colour:black Material:plastic Plug Type :EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage: AC100-240V Package Contents: 1 x Charger 1 x Plug Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.