I currently have an iPaq 1910 that does not have a working backup battery. That is the one that is supposed to keep all of your data while you replace the rechargeable lithium battery. Currently if my lithium battery goes dead I lose all the data in my device.
Is there a way that I can replace the battery ? The ideal is if I can do it myself. The second is if I can send it in to someplace that will do it for me.
Any instructions or references would be great. Thanks in advance.
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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.
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.