Checking the Battery Pack (TP 570 - 2644)

Checking the Battery Pack

Battery charging does not start until the Fuel-Gauge shows that less than 95% of the total power remains, with this condition the battery pack can charge to 100% of its capacity.
This protects the battery pack from being overcharged or from having a shortened life.

Note: The battery pack might not be able to charged when it is hot.
In that case, remove it from the computer and leave it at room temperature for a while.
After it cools down, reinstall it and recharge it.

Do the following:

  1.  Power off the computer.
  2.  Remove the battery pack and measure the voltage between battery terminals 1 (+) and 4 (-).
     See the following figure:

    Terminal Voltage (Vdc)
    1 0 to + 12.6
    4 Ground (-)


  3.  If the voltage is less than +11.0 V dc, the battery pack has been discharged.  Recharge the battery pack.

    Note: In this case, the battery pack is over-discharged.
     It takes at least 3 hours to recharge the battery pack even if the indicator does not turn on.

  4.  If the voltage is still less than +11.0 V dc after recharging, replace the battery.
  5.  If the voltage is more than +11.0 V dc, measure the resistance between battery terminals 3 and 4.

     The resistance must be 4 K to 30 K ohm.

  6.  If the resistance is not correct, replace the battery pack.
     If the resistance is correct, replace the system board.

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