Member Avatar for kool5800

Does anybody know how to reset battery for Compaq Presario 700 please help.

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As and note, old laptop packs often fail and do need replacing. Before buying a new pack for a Compaq Presario 700, try a few safe checks and a simple reset/calibration. These steps address bad charge reporting or an embedded controller that needs to re‑learn the cell state; they will not revive a physically damaged or capacity‑dead battery.

  • Power down, unplug the AC adapter, remove the main battery pack and inspect it. If the pack is swollen, hot, leaking or corroded, stop here and dispose of it safely.
  • With battery out and AC disconnected, press and hold the power button for 20-30 seconds to drain residual power (this can reset the embedded controller).
  • Reconnect AC only and boot the laptop to confirm it runs from mains. Shut down, reinsert the battery, plug in AC and charge to 100% uninterrupted.
  • Calibrate the gauge: after a full charge, change power options so the machine does not sleep/hibernate, run on battery until it shuts down, then charge back to 100% without interruption. One cycle can improve reporting accuracy.

If reporting remains wrong or runtime is poor, update the BIOS from HP support (model-specific) or plan to replace the pack. Opening the case to remove internal CMOS or to perform deeper EC resets is advanced and should be done only with ESD precautions or by a technician.

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Member Avatar for jbennet

buy a new one, its probably dead. Batteries in constant use only last 6-24 months

Member Avatar for cguan_77

batteries are consumable part, after a period of time it needs to be replace..battery cells might not be working anymore if used for a long time already.. try jbennet suggestion..

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