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1.Lead acid batteries 's electrodes are mainly made from lead and its electrolyte is made of sulfuric acid solution.
2.There's two types of the lead-acid battery, flooded and vented lead acid battery.
3.The former needs regular acid-fluid injection to maintain,and the latter is the non-maintenance type but still needs regularly battery detection.

1.Nickel-cadmuim battery can repeatly charge and discharge over 500 time.
2.Internal resistance is low,charging speed fast , can supply large current for loading,voltage hardly change in process of discharging. It's a ideal DC power supply battery.