... .8V3A li-ion charger for 4s battery pack color:black model:JY-L4S30 Features: with ... ms, 50 ms, 30 msVibration resistance: 10 to 500 Hz, 2 G 10 min. / 1 cycle time, 60 ... -output: 1.5 KVACIsolation resistance: input/output: 10 M between OhmsWorking temperature, humidity: '10 °C ~ + 50 °C, and 20% ... ~ 90% RHStorage temperature, temperature: '10 °C ~ + 60 °C, and 20% ~ 90% RHSafety certificate ...