I think its dell and something detecting this
Unplug the mains
note the battery power reading
shut down (off)
Wait 5 mins
take the battery out
Power in
Boot to normal Se7en desktop
Open Windows explorer or something just so its working
Shut down
Wait 5 mins
Replace Battery
Boot batter only
See the reading for power now
Any different? Has the warning message gone on this boot
Just a way to stop the message i am not giving any advice on the battery at all