Question about HP FA162A for iPAQ 2215/4155 Keyboard

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HP Ipaq 4155 not recognizing battery

I have an HP Ipaq 4155 and after a major battery drain I thought the battery was dead. I orderd a replacement battery, installed it, and charged it for the required amount of time turned it on and instantly got the "battery low" message. I charged it again and received the same error. I found my old cradle and took the battery out and charged just the battery and it charged fully. Installed the battery in the ipaq and still received the "battery low" message even though I know that the battery is indeed charged.

So, to summarize, here is the issue:

My Ipaq is not recognizing its battery at all and "thinks" it is always on system battery. My ipaq also may not be charging batteries but I can't say for certain because it doesn't see the battery.

Things I have tried without success of resolving the issue:
Manually charging just the battery in a cradle.
Resetting the Ipaq.
Reinstalling the latest bios.

Posted by on

  • NotJoMama Dec 18, 2007

    Exact same problem...battery indicated it was low so I stuck it back in the charger but even after 36 hours it was not charged. I had a spare battery so I put it in the cradle, and now it is totally drained and will not charge either. The unit works perfectly fine otherwise, but I'm now down to 10% battery and 60% on backup battery (1/2 hour ago it was at 83%). I've searched the net for the last three days with no resolutions/suggestions!!! Help!

  • GeekMAZ Apr 09, 2009

    The very same battery not recognized by the iPAQ (4155) or indeed shown dead, works perfectly with another iPAQ I used, rx1955. The problem then seems to be hardware related rather than battery-related.

    The instruction manual that came with your iPAQ has the solution to the problem, so just look for it (btw, I lost mine.)



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Maybe it is the problem of your phone.
I also encountered similar problems.

Posted on Jun 16, 2009

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Try taking out battery and plug in power. If it works, battery is faulty. If not,
Try taking out your hard disk plug in power, if it works, hard disk is faulty. If not,
Try taking out memory card, if there's a sound, memory card faulty. If no sound, it's your motherboard that is causing the error.

Note: If machine is under warranty no need to pay for the repairs.

Posted on Jun 03, 2009


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Posted on Jan 02, 2017

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