1. All battery manufacturers have factory resistance, which is the most authoritative resistance value of the battery, and other so-called standard resistance values are written out of garbage or approximate resistance.

2. When the battery is used in a group, it should follow the balance principle of the same batch, the same resistance, the same model, and the same voltage and the new and old batteries cannot be mixed, different batches of batteries cannot be mixed, different voltages cannot be mixed, and different resistance values cannot be mixed.

3. The first principle of battery selection is discharge, the discharge capacity is the same as the nominal capacity, and the resistance value difference before discharge and after discharge by DFT-6101 Battery Reisitance Tester does not exceed 15%。

4. For individual backward batteries in the same group, it is not recommended to replace the new battery, and the feasible way is to use the DFT-6900 Battery-Activator to replenish this bad battery by charging-discharging to achieve the purpose of activation and make it as close as possible to the performance of other batteries.

5. Try not to overcharge and over discharge the battery during maintenance and its voltage is subject to ±10%, and a full-capacity discharge is required every six months to achieve the effect of sulfur removal.