Green Power Tech Group Ltd.

4.1 Charging
    While the Green Power GEL battery will accept a charge extremely well due to its low internal resistance.
    For using the sealed design, over-charging will dry out the electrolyte by driving the oxygen and hydrogen out of the battery, through the safety valves. Capacity is reduced and life is shortened

    If a battery is continually under-charged, a power robbing layer of sulfate will buildup on the plates. Battery performance is reduce, life is reduced.
    So what is important for GEL battery that is: charge at least 2.30V/Cell volts but no more than 2.35V/Cell volts at 68^oF(20^oC). Constant current chargers should never be used on GEL battery.

  Constant charging voltage: Shown is the constant charging voltage in relation to the ambient temperature. The bandwidth shows a tolerance of ±30mV/Cell. This constant voltage is suitable for continuing charging and cyclic operation. In a parallel standby mode it always keeps battery in a fully charged state; in a cyclic mode, it provide for a rapidly recharging and highly cyclic performance.