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Apple Xserve/Mac Pro RAID Card Battery Repair

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Discharging (refreshing) the cell
  • Grab an old torch (or flashlight for those over the pond) and pull the light bulb out. This will serve as our load. (Note: This needs to be an incandescent bulb)

  • Connect the bulb across the two terminals of the cell without letting the terminals touch. (A set of crocodile clip leads makes this a breeze). The bulb should light.

  • Connect your voltmeter too and watch the voltage fall. Disconnect the bulb when it reaches around 3.5V and proceed to charging (Step 6).

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