SONY PCGA-BP51 Replacement notebook Batteries for PCG-505G/A4G PCG-505GX/4G ...

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Claims of fast charging a Li-ion SONY battery PCGA-BP51 in one hour or less usually results in lower charge levels. Such a charger simply eliminates stage two and goes directly into 'ready' once the voltage threshold is reached at the end of stage one. The charge level at this point is about 70%. The topping charge typically takes twice as long as the initial charge.
Depending on the charger and the self discharge of the SONY PCGA-BP51 notebook battery, a topping charge may be implemented once every 500 hours or 20 days. Typically, the charge kicks in when the open terminal voltage drops to 4.05 volts per cell and turns off when it reaches 4.20V/cell.
No trickle charge is applied because the Li-ion laptop batteries for SONY PCGA-BP51 laptop is unable to absorb overcharge. Trickle charge could cause plating of metallic lithium, a condition that makes the cell unstable. Instead, a brief topping charge is applied to compensate for the small amount of self-discharge the PCGA-BP51 battery and its protective circuit consume.

Use SONY PCGA-BP51 battery needing attention some matters :
1. Carefulness read narrate book of battery,use commendatory battery.
2. Research the electric appliance and the PCGA-BP51 laptop batteries contact elements is whether clean, when necessity is clean with the wet cloth mop, after dry loads according to the correct polar direction.
3.When non-adult custody, don’t let the child replace the battery, compact battery like AAA should place the place which the child cannot attain.
4.Don’t make new and old or different model battery put off.
5. Don’t try to make SONY battery PCGA-BP51 rebirth use hot up, charge,or other way.
6. Don’t let battery short circuit.
7. Don’t hot up laptop battery for SONY PCGA-BP51 or loss it in water.
8. Don’t strip battery.
9. Electro-adapter should cut switch after use.
10.Should take off SONY PCGA-BP51 battery from adapter when battery long time no use .
11.Battery should stock in cool place,and dry.