battery 6-DZM-12 e-bike battery , it is maintenance free battery , high capacity , long service life , with intelligence IC . Nominal Voltage: 12VRate Capacity: 12AH/2HrDimension(mm): 151L*99W*96HNet weight(Kg): 4.2kgInside with intelligence IC , it can be anti-overcharged and anti-overdischarged, happen low frequency pulse to self-repaired . IQ Battery 12V12Ah