Ipaq HX4700 Series

I think there was a thread on this a year ago. I've had a 4700 & 5555, but only have saved the procedure for the 5555, hopefully similar for your 4700.. Suggest you search for the manual online and look for this similar item. Good luck.
~Barny
Here is a RAS response for one of the two, but don't recall which one:
1. How to correct iPAQ 5450, 5455, 5550, 5555 battery charging problems / dead unit syndrome.

The iPAQ 54xx or 55xx will not power on if the batteries charge is lower than 3.2 Volts, if your battery charge falls below the 3.2 volts level your unit will not turn on, you need to plug the iPAQ into a cradle or AC charge adaptor. Note the charging light on the iPAQ will not flash at all (normally flashes orange) until the battery charge has reached a minimum charge level of 3.2 volts. You then need to perform a normal reset, then the unit should switch on normally.



Here is the 5555 user guide instructions:
HP Procedure is as follows:


To charge and reset the iPAQ Pocket PC h5400:


i) Connect the iPAQ Pocket PC h5400 to an A/C power supply.

ii) Charge the battery to the minimum level of 3.2 Volts. This will take 5 to 30 minutes depending on the current charge level.

iii) Perform a normal reset.

iv) Power on the iPAQ Pocket PC h5400