Second Battery Not Charging The Second Battery Is Not Chargeing When Plugged

Greeting - I do wish that you would have given more info - like wether it is originally that model's or not. However this can be the possibilities.

1. The battery contacts may be dirty and needs cleanig

2. The laptop may be failing to recognise the battery if it is not originally for the model but made by third parties.

3. Laslty the battery may be sadly dead.

I really hope this helps

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Hope that is helpful.
Kervz at www.satechhelp.co.za

If your hp 2740p battery is not charging or laptop does not indicate that the battery is charging, the most likely scenario is that the battery itself is operating correctly, but its power management software may have become corrupt. In order to correct the problem, you will need to uninstall and reinstall the power management software by using the Device Manager. This document will explain how to uninstall and reinstall the ACPI Battery listings in Windows Vista, as well as how to obtain and install updated BIOS files, if needed to correct other battery issues. Uninstalling and reinstalling power management software in Windows Vista In order to correct problems with the battery's power management software, follow the steps below. 1. Click Start and type device in the search field, then select Device Manager . 2. Expand the Batteries category. 3. Under the Batteries category, right-click the Microsoft ACPI Compliant Control Method Battery listing, and select Uninstall . WARNING: Do not remove the Microsoft AC Adapter driver or any other ACPI compliant driver. 4. On the Device Manager taskbar, click Scan for hardware changes . Alternately, select Action > Scan for hardware changes . Windows will scan your computer for hardware that doesn't have drivers installed, and will install the drivers needed to manage your battery's power. The notebook should now indicate that the battery is charging.