[ICOM] IC-R10 Does it have an internal battery ??

[Jim Miller KG0KP]

I came across my Icom IC-R10 scanner that has not been turned on for 
probably 8 or 9 years.  No batteries in it, I remember taking them out as I 
knew it would probably be quite some time before I used it again.  Installed 
4 AA standard dry cells and nothing.  Yes they are in the way the markings 
show.  Yes they measure 6.50 volts across them when installed.

Also found the charge unit for it when using ni-cads.  Checked the charge 
switch and it was on so switched it off.  Plugged it in and all is well.  It 
works.  Unplug the wall-wart - radio dropped power.  In on, out off. 
Installed different new batteries - same thing.  Visually checked battery 
contacts at end batteries and they appear to be OK.  All appear to be tight 
as verified by voltage readings again verified with second set of batteries.

Was thinking it might be the charge connector disconnecting the batteries 
when connected but that cannot be the case as it would not be able to apply 
charge to the ni-cads if they were installed and the would not need the 
little switch under one of the batteries that does the disconnect for dry 
cells from the charge plug.

Anybody know if there is an internal battery that may have gone dead?  Know 
that all the memories I loaded way back then are still alive and well.

Ideas ?????

THANKS es 73, de Jim KG0KP