Suitable for 3S 11.1V li-ion batteriesWe strongly recommend that you use a li-ion compatible chargerBattery size:139MM*60MM*33.5MM【Charger parameters】Input 100-240 volts,50/60 Hz, output :12.6 volts,5 amps ±0.2Suitable for 10ah, 20ah, 50ah batteries (with BMS system)The charger is fitted with DC 5.5MM*2.1MM connectorWhen charging, the red light on the charger lights up, and when the battery is fully charged, the indicator turns greenWithout charging or after charging, be sure to unplug the DC terminal and AC terminalCharger charging speed, select 5Amp【Charging speed】Divide the battery's current rating (Ah) by the charger's current ratingFor most applications, charging times of 3-10 hours provide the longest battery lifeBut if your application requires fast charging, li-ion batteries can be safely charged in less than 1 hour (1C ratio).In our lab tests,We found that the longest life of li-ion batteries is at a charging speed of 0.3C or lower(We recommend that the charger be rated at 1/3 or less of the rated current of the battery for maximum life).【About Us (QDD】Quality certified charger is your best helperOur factories have been favored and praised by global trading partnersWe'll be on Amazon，we offer 1 year customer serviceIf you have any questions, please feel free to contact usOur global customer service staff respond as quickly as possibleAnd will help you solve the problem in the first time.