Question about HP iPAQ H4150 Pocket PC

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The backup battery not working

The backup battery is not working it allway fully charge but if i take out the main battery it looes all it memory. can the backup battery be replaced.
any help with this matter would help.

thanks

Paul

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  • Used2Batech Mar 10, 2008

    I have recently acquired a used HP Ipaq4150. The backup battery appears to be completely dead as it is showing 0% despite sitting in it's cradle for over 6 hours. I have read your blog about replacing the backup battery however I'm not sure where to find a replacement and the hardware screws do not seem to be standard phillips head screws. Suggestions?

  • pa1gl Aug 06, 2008

    I am having the same problem with already my second 4150, is this a problem of the backup battery it self , if so, how to replace it without damaging the 4150 ? if not what can be the problem, the battery looks full.

    BR Gerad

  • tjaxbr Mar 31, 2009

    do you know the battery voltage ?because I have the same problem and, I need to know it to replace for a new one.

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Hello Paul,

Yes the battery can be replaced but this will require you to dissasemble the pda. The problem you face is a clear sign that this battery has failed. There has always been a problem with hp's battery measurement algorithm regarding that secondary backup battery. Altrough it is empty or even if you remove it, the program will still display a full bar. In order to change this battery you will need to remove the screws from the back of your unit. The casing will come off pretty easy. The back-up cell is a small coin like battery most probably wrapped in a green plastic shel. you should find a similar battery and connect the pins from the old one to the new. The battery size is not critical as long as you can make it to fit in the space inside. Try, however, not to use a very small battery because it will drain much faster then larger ones. Carefull when observing polarity.
If you need more informations please reply.
Bogdan.

Posted on Feb 09, 2008

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Apc hi800sq


follow this steps and fix it. God bless you
Plug the battery backup into a working electrical outlet. If the battery backup turns on when the power button is pressed, then the problem may be that the previous electrical outlet is faulty. Proceed to step three. If the battery backup doesn't turn on, proceed to step two.
  • 2 Reset the circuit breaker on the battery backup. APC battery backups have a labeled circuit breaker button located on the unit near the phone line, fax line, USB, network and coaxial cable inputs. Press the button to reset the circuit breaker. Power on the battery backup by pressing the power button. If the battery backup powers on, proceed to step three. If the battery backup doesn't turn on, proceed to step six.

  • Read more: http://www.ehow.com/how_7266444_troubleshoot-apc-battery-backup.html#ixzz2lwOvPO75
  • 3 Determine if the battery backup is charged and providing battery power. With the battery backup on and plugged into a working electrical outlet, plug a computer monitor into one of the battery backup outlets labeled "battery backup plus surge protection" on the battery backup. (APC power supplies have some outlets that provide only surge protection while the other outlets provide surge protection plus battery backup.) Turn the monitor on. Unplug the battery backup power cord from the wall outlet. If the monitor remains on, the battery is holding a charge, supplying electrical power and the battery backup is working properly. If the monitor goes off, proceed to step four.
  • 4 Charge the battery. Plug the battery backup into an electrical outlet and allow the battery to charge for 16 hours. This will fully charge the battery.
  • 5 Test battery charge. Once the battery is fully charged, repeat step three. If the monitor stays on when power is interrupted to the battery backup, the issue is solved and the problem resulted from an incompletely charged battery. If the monitor turns off when power is interrupted, the battery within the battery backup is faulty and needs to be replaced.
  • 6 Replace the battery backup unit. The unit itself is faulty. If the battery backup is under warranty, contact APC to request a replacement.
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