for DC 5.5*2.1MM Size.Specifications: - 100% Brand New and high quality Super strong protection.- lnput: 100-240VAC,50/60Hz- Output: 54.6V 2A- Charge indicator: Charging the red light is full of green light- Security protection: OVP/OCP/ Overload protection/ Short-circuit protection- Color: Black- Plug: EU / US / UK / AU(Please choose the plug of your country, we will ship according to the plug of your choice, please leave a message to us if you don't know your country plug.)- After-sales service: The charger does not work after receiving the package, please contact customer service in time, Faulty charger We will refund or re-delivery, Do not give negative feedback immediately, Please contact customer service, Thank you!Package included: 1Pcs 54.6V 2A Charger1Pcs power power cableUse 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 damaged. 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.