IPaq 1910 backup battery replacement

http://www.paulstravelpictures.com/HP-iPAQ-HX4700-PDA-Backup-Battery-Replacement-Guide/index.html
CHECK OUT THE LINK.

Hello,

You built one of these too, eh?

Yes, there can be a problem doing this. First off, 3 AA batteries does not equal 4.2 volts, they are 1.2volt nominal so 3 * 1.2 = 3.6volts. When they are just off the charger, terminal voltage will be closer to 1.5v, so 1.5*3 = 4.5 volts.

Using ohms law, E=I * R, we can find your current as I = E / R or I = 4.5v / 4r7 as .95Amps (almost a full amp) that you would see worst case. The resistor is doing nothing for you.

The reason that the charge light blinks intermittently is because the charge controller (lithium battery, right?) is pulsing due to low voltage.

Try this: Take *6*, yes, 6, AA batteries, your choice of chemistry, and put them in series. That will give you a nominal (alkaline) voltage of 9v. Connect a low dropout 5v regulator such as an LT1117-5. Then you will be able to use your battery backup much more effectively.

On a different note, I used 4xAA (NiMH) and powered my ipaq 3650 directly. Worked great. Your mileage may vary though.

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.

https://h30434.www3.hp.com/

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

There are two batteries. main and backup battery

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

http://www.repairhppda.com/video/Repair-for-HP-iPAQ-HX4700-HX4705-backup-battery-replacement-guide-V6HR.html

Hi, Jim--
When you take the battery out of an IPAQ you're performing a hard reset. I've got 4 different IPAQs and it does the same thing on all of them.
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.

http://www.ipaqrepair.co.uk/guides/HP%201900%20Replacement%20Backup%20Battery.pdf

It could be the mainboard on the ipaq is messed up. Bring it to a local tech maintenance shop

If you have a computer it should be on your cd's that came with it it is on all new computers

 recharge the battery by connecting the HP iPAQ to AC power using the cradle or the AC adapter or insert a fully charged battery into the HP iPAQ.