Not starting IPQA 5555 is not starting with Battery. When I put it in crdle then it is working fine but as soon as I remove it from cradle then looks like it is powering off. I also check the Battry. The battery is fully charged. Can you please help in troubleshoot for the above?

Cradle and contacts are fine. Cradle circuit is nothing but a reed relay and few wires, relay closes on proximity to robot's body, therefore no voltage on contacts before robot is close to cradle.
There is a thermistor inside of battery, and mine was bad. I removed it and now I am charging the battery from my bench power supply at about 220 ma current, overnight, and it works. Probably the solution is to get a new replacement battery, but the one with the thermistor inside (OEM), easily recognized by the third wire, and all should be fine, assuming that nothing else is wrong with charging circuit or power adapter (12v/1A)
Hope this will give you some ideas of where to poke.
Once successful, please post your solution.

Is it the right cradle to connect. Sometimes the cradles look alike but actually are different. You can check the back and the bottom and see whether all the ports are the same between those cradles. Replace the battery and see if you suspect that is a battery issue. Some of those batteries are not really endurable.

if that is the case I would suspect a bad battery

The cartridges & container must be removed and reinstalled.

As I understand it, the basic cradle that comes with the Compaq Ipaq 3870 does not charge. If I were you, I'd either seek out a charging cradle or google the instructions for modifying your cradle to charge. Good luck...

This from Sony website:

To ensure the proper operation of the battery, please do as follows after charging the battery.
(1) When charging by connecting the AC adaptor directly to the camera Pleasedisconnect DC IN from the camera after charging is completed. Also, itis recommended to remove the battery from the camera when charging iscompleted as the battery is discharged slightly even if the camera isturned off.
(2) When charging with the supplied USB cradle Ifthe camera is installed in the USB cradle, please leave the power cordconnected to the outlet (when using the power strip, please leave itsswitch to on).If you want to unplug the power cord (or switch off thepower strip) after the battery has been charged using the USB cradle,please remove the camera from the USB cradle. Also, it is recommendedto remove the battery from the camera when charging is completed as thebattery is discharged slightly even if the camera is turned off.
NOTE: When you charge the battery by connecting the AC adaptor directly tothe camera or using the USB cradle, do not leave it with the power corddisconnected from the outlet.

Should it not work, continue with the manual reset procedure below:

1. Turn off the camera.
2. Ensure the camera is not connected to an AC power adapter.
3. Remove the battery from the camera for 15 seconds.
4. Reinsert the battery.
5. Turn on the camera.

NOTE: If the issue is not resolved by performing a reset procedure, service may be required .

I would say the first thing to check would be the charger. If no lights came on it that would be my guess.

I sent my battery back and it was replaced by the supplier. The unit is fine now so the only conclusion I can come to is that it is due to a faulty battery....

Another way I've found to do this is to press the power button and reset button at the same time. Then when you get the message to clear all data press cancel. I get this every time I re-charge my axim in the cradle. Doesn't anyone have a better solution? When it happens I have to reset my time. It's usually a day behind.

This original question is so old it probably won?t help the original poster but instead is meant for anyone who runs across this in the future with a similar problem. If you haven?t already done so backup your data, remove any extra cards or plug-ins and do a cold-boot. If that doesn?t work the next step is to remove Active Sync and install the latest version from Microsoft. If that doesn?t help then the next thing I would try is syncing to another PC and then another cradle if possible. If the problem persists the only thing left to try would be reflasing the ROM.