Question about HP iPAQ H1940 Pocket PC

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How to change the backup battery of ipaq 1940?

The back-up battery of my ipaq 1940 shows zero in "system".
so every time I need to remove the battery, all my installed application are gone and need to reinstall. Kindly help on how to remove the cover so I can change the backup battery inside. Thanks in anticapation.

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This PDA is relatively difficult to take apart. I've done it myself and it was very difficult. It is not recommended by any means because you can seriously mess up your ipaq by taking it apart. On the site I gave you after you buy and receive the replacement backup battery, if you do it yourself, will give you a site to get instructions from. You can also send it in to have it done professionally.

Posted on Nov 01, 2007

  • ryhermony Nov 22, 2012

    The PDA has been taken apart by an expert BUT the battery that was sent to me as the correct battery is too big. How can I make absolutely sure that this time a correct battery is sent to me. the original has 055 on one side and the plug is half the size of the battery sent to me thru ebay. What do I ask for? The battery is a tiny green circle wrapped in green plastic with a cable and a white plug about 1.5 mm diameter. To Mr. Robinson, the PDA is backed up on my land line computer.



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SOURCE: the back-up battery of my

You would have to backup your iPAQ probably through your computer instead of on the handheld. Otherwise there is no way to save your applications.

Posted on Mar 01, 2011

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The back-up battery of my ipaq 1940 shows zero in "system". so every time I need to remove the battery, all my installed application are gone and need to reinstall. Kindly help on how to remove...

You would have to backup your iPAQ probably through your computer instead of on the handheld. Otherwise there is no way to save your applications.

Mar 01, 2011 | HP iPAQ H1940 Pocket PC

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Replaced ipaq 4150 internal backup battery but

read the manual yet, or lost it> or?
most of these have 2 batteries
one that pops out one more that solders down.
guess which one retrains data.
finding parts for relics like this is not fun
what good is this thing besides, wall art?

why ask here at all, we are not HP , nor are there HP books here.
so ask here.

there are folks there that might remember so long ago
or even have old books laying about after all they are HP.

Dec 10, 2017 | HP iPAQ H4150 Pocket PC

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IPAQ 1910 Backup Battery Is Dead, Doesn't Take A Charge

You need a new battery and yes you can replace it.Check with HP or a wireless store for the right battery type

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Ipaq 1940 losing programmes during main battery changeover

  1. Plug the charger adapter into the charging port on the bottom of the HP iPAQ Pocket PC.
    Figure : Charging the battery
  2. When the power indicator on the top of the HP iPAQ Pocket PC turns solid amber, the unit is fully charged and can be disconnected from the AC adapter (approximate time to fully charge a unit is four hours).
NOTE: The amber charge light blinks while the battery is recharging and turns solid (nonblinking) when the battery is fully charged.In the event of a low backup battery warning, charge the unit immediately before removing the main battery to avoid data loss. To view the amount of charge left in the backup battery, tap Start, Settings, the System tab, and Power.
Charging with the universal desktop cradle and AC adapter Use the universal desktop cradle to charge the HP iPAQ Pocket PC, or synchronize the HP iPAQ Pocket PC with a computer.
Follow these steps to charge the HP iPAQ Pocket PC using the universal desktop cradle:
  1. Plug the AC adapter into an electrical outlet and connect the other end of the AC adapter to the AC connector on the universal desktop cradle.
  2. Connect the serial or USB cradle cable into the appropriate port on the desktop PC.Figure : Connecting with the cradle
  3. Slide the bottom of the HP iPAQ Pocket PC into the cradle and push firmly to seat it.
CAUTION: To avoid damaging the HP iPAQ Pocket PC or the cradle, make sure the pins are aligned before pushing the HP Pocket PC into the cradle.
    Figure : Charging with the universal desktop cradle
  1. AC adapter into electrical outlet
  2. AC adapter into universal desktop cradle
  3. HP iPAQ Pocket PC into cradle
NOTE: The amber charge light blinks while the battery is recharging and turns solid (nonblinking) when the battery is fully charged.There are stabilizers located in the universal desktop cradle that assist in aligning the unit when there is no expansion pack attached. When placing the HP iPAQ Pocket PC with an expansion pack attached into the universal desktop cradle, the stabilizers will be pushed down by the expansion pack. To release the stabilizers for use without an expansion pack, press the button on the back of the cradle.
Charging with the optional USB Autosync cable Charge the HP iPAQ Pocket PC using the optional USB Autosync cable by connecting the Autosync cable to the HP Pocket PC and the personal computer. The HP Pocket PC will be charged using power from the personal computer.
For more information on charging the HP Pocket PC using the optional USB autosync cable, from the Today screen, tap Start, Settings, the Systemtab, Power, the USB Charging tab, Settings, and Help.
Charging a low battery The HP iPAQ Pocket PC will not turn on if the battery has a low charge (less than 3.2 Volts). Fully charge the battery prior to using the HP Pocket PC.
If the charge on the battery goes below the 3.2 Volts as a result of not being connected to the universal desktop cradle or the AC adapter, no damage will occur to the battery. However, the HP iPAQ Pocket PC charge indicator light will not flash until the battery reaches the minimum charge of 3.2 Volts and a normal reset is performed.
Follow these steps to charge and reset the HP iPAQ Pocket PC:
  1. Connect the HP iPAQ Pocket PC to an A/C power supply.
  2. Charge the battery to the minimum level of 3.2 Volts (this will take 5 to 30 minutes depending on the current charge level).
  3. Perform a normal reset by using the stylus to lightly press the Reset button on the bottom of the HP iPAQ Pocket PC.
  4. Turn on the HP iPAQ Pocket PC.
Keep the HP iPAQ Pocket PC connected to the universal desktop cradle or AC adapter when it is not in use.

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1 Answer

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You need to purchase a new removable battery for your RX
The removable batts usually only last about a year (like cell phone batteries).
Although it is showing 100% charge, the battery is not storing enough power to run the ipaq

The rx series uses 2 batteries, one is the removable one u can see/access when u remove the back cover. The other batt is a small round batt which stores the basic info for your system (so you don't lose your data when u swap out the removable battery).

This small (backup) batt is similar to the cmos battery on a laptop or pc.
You cannot easily replace this, as the unit needs to be disassembled to access this batt.
If you are tech-y (and brave), the replacement button batteries are sold on ebay for $9-12

Normally, if your removable batt is bad, you could still use your unit plugged in, and could
remove from AC power without losing data. Not the case if your replaceable batt is exhausted.
When both batteries are bad, you lose everything when u remove unit from AC power.

My workaround without having to disassemble unit:
Purchase and fully charge new removable batt (They have huge capacity ones available for like $15 - better than the original !).
Load up all your programs & settings the way you like.
Perform full backup to SD card (& also on PC via active sync - to be safe)
Now the only time you should lose your data (like hard reset) is if you allow the battery
to completely drain, in which case you can restore your backup.
If you purchase 2 removable batts, you can easily swapout without losing data if you
use the usb charge cable & leave ipaq plugged in while you change battery

Hope this helps

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the below video shows how to replace the backup battery, V6HR , of your hp ipaq hx4700

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My solution was to back the IPAQ up using the internal backup program (back up to IPAQ storage) and then replace the battery, then restore the last backup.
Saved me a heck of a lot of time. It's been hard to remember to back up everytime I add a program or change data majorly, but it's probably the best thing to do.

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If an ipaq loses power , then all data in RAM is lost. It's important to keep it charged. It's also important to do regular backups..... so there are two backup options - one is thru Activesync which will backup to your PC and one is the IPAQ's own backup program which will backup to the IPAQ FILE STORE (area in ROM) or a SD card. I do the Activesync backup every time I sync and then the IPAQ backup about once a week or immediately before a system change. Activesync backup ------------------------ Here is a guide which best explains it this guide suggests doing a full backup, but it's fine to do an incremental backup each sync - this means that only changes will be added to your backup and makes the whole process much quicker. IPAQ Backup ----------------- So under Programs is a program called IPAQ Backup. The default location is IPAQ FILE STORE which is an area in ROM and is not lost thru a power failure nor hard reset. You may also choos to backup to a SD card - a full backup will need roughly 20MB. So in this backup procedure, if you click on 'Browse' you can choose a SD card. A restore can then be performed from the IPAQ FILE STORE or SD card (depending on which location you chose) and so if you are away from your PC, this will be no problem. A restore this way , rather than thru Activesync is also much quicker, so if you have a choice go this route.

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