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Sony VAIO VGN-FZ21M laptop battery - Sony VAIO VGN-FZ21M battery replacement

  • This replacement laptop battery for Sony VAIO VGN-FZ21M was specifically designed for your Sony notebook computer and built to meet or exceed OEM's specification. It is engineered to be thoroughly tested before it leaves the factory floor, 100% compatible with your original laptop.
  • Image Chemistry Voltage Capacity Color Condition Price
    Sony VAIO VGN-FZ21M battery Li-ion 11.1V 4400mAh Silver Brand New $66.92
    Sony VAIO VGN-FZ21M battery Li-ion 11.1V 6600mAh Silver Grey Brand New $77.30
If you are looking for the best brand new laptop battery at the most preferred price, you have come to the right place. We provide the high quality Sony VAIO VGN-FZ21M laptop battery at the lower price with the excellent service, all in a secure and convenient platform.
  • Our Quality: We believe that our customers should receive the high quality Sony VAIO VGN-FZ21M battery at the lower prices. We stand by and guarantee the quality of our battery.
  • Our Price: We have professional team for market price research to make sure we can offer best price for customer on our Sony VAIO VGN-FZ21M laptop battery.
  • Our Service: We have a dedicated team of customer service executives who are eager to help you save time and money by sharing their knowledge and expertise on batteries and related products.
  • Your Satisfaction: Your absolute satisfaction is our top objective. We stand by the quality of our laptop battery and offer a 45-day money-back guarantee on all our products, no questions asked. Our products also carry a 24-month full repair or replacement warranty for any form of manufacturing defects.
    • Use Sony VAIO VGN-FZ21M battery needing attention some matters:

    • * Carefulness read narrate book of battery, use commendatory battery.
      * Research the electric appliance and the 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.
      * New Sony VAIO VGN-FZ21M Battery Pack must be fully charged before use.
      * Li-ion and NiMH Battery can not interchangeable.
      * Don't make new and old or different model battery put off.
      * Don't try to make Sony VAIO VGN-FZ21M laptop battery rebirth use hot up, charge, or other way.
      * Don't let battery short circuit.
      * Don't hot up laptop battery for Acer or loss it in water.
      * Don't strip battery.
      * Electro-adapter should cut switch after use.
      * Should take off battery from adapter when battery long time no use .
      * If you don't use your laptop for a period of time, you must fully discharge then recharge the battery.
      * Battery should stock in cool place, and dry.

    • How to Charge the Sony VAIO VGN-FZ21M battery?

    • Claims of fast charging a Li-ion battery 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 VAIO VGN-FZ21M laptop 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 battery 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 battery and its protective circuit consume.

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