Cheap Eee PC 1005HA 10.8V,6 cell 3 cell Laptop Batteries,battery for ASUS Eee PC 1005HA ,brand new, 1 year warranty! Ship to most countries
How to restore and prolong Sealed Lead Acid batteries(1)?
Once the SLA battery has lost capacity due to sulfation regaining its performance is often difficult and time consuming. Reasonably good results in regaining lost capacity are achieved by applying a charge on top of a charge. This is done by fully charging an SLA battery, then removing it for a 24 to 48 hour rest period and applying a charge again. This is repeated several times, and then the capacity of the battery is checked with a full discharge. The SLA is able to accept some overcharge, however, too long an overcharge could harm the battery due to corrosion and loss of electrolyte.
Applying an over-voltage charge of up to 2.50V/cell for one to two hours can reverse the effect of sulfation of the plastic SLA. During that time, the battery must be kept cool and careful observation is necessary. Extreme caution is required not to raise the cell pressure to venting point. Cell venting causes the membrane on some SLA to rupture permanently. Not only do the escaping gases deplete the electrolyte, they are also highly flammable!
How Effects of charge voltage on a plastic SLA battery(2)?
An SLA must be stored in a charged state. A topping charge should be applied every six months to avoid the voltage from dropping below 2.10V/cell. The topping charge requirements may differ with cell manufacturers.
An approximate charge-level indication can be obtained by measuring the open cell voltage while in storage. A voltage of 2.11V, if measured at room temperature, reveals that the cell has a charge of 50 percent and higher. If the voltage is at or above this threshold, the battery is in good condition and only needs a full charge cycle prior to use. If the voltage drops below 2.10V, several discharge/charge cycles may be required to bring the battery to full performance. When measuring the terminal voltages, the storage temperature should be observed. A cool battery raises the voltage slightly and a warm one lowers it.
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