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nature : lead-acid batteries in the main drawback is lower than the energy and the need for regular maintenance. Therefore, the design of a new generation of lead in the cathode grid plate with no antimony or less antimony, or use lead-calcium alloy to improve hydrogen-electric potential to reduce self-discharge; Make the electrode design into excessive, over charging only positive out of oxygen, it will be negative gradual absorption of lead. Owing to the reduced out-minded and will reduce water losses, often without pay. It can cause battery case sealed, but still have a demoralizing valves, the pressure for the occasional excessive discharge gas. Battery called VRLA (valve regulated lead acid storage battery) is more reasonable, it is charging higher equipment requirement be limited voltage (less than 1.32 volts), otherwise there is still the problem of excessive water loss. To reduce weight, the traditional hard-rubber shell switch ABS plastic; Conductive lead the Department to reduce the amount of; Using highly absorbent glass fiber membrane used to replace the original partition, to reduce excessive electrolyte. Using these measures, the energy density batteries from the small 25 watt / kg increased to 40-45 kilowatt hours / kg; Batteries are sometimes also referred to as "maintenance-free" (actually less maintenance) battery (maintenance-free battery; MF battery). See lead-acid batteries.
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