Thanks. That is exactly what I did and it cleared the error message. This process is very easy to perform if you go to the Dell support website, search for this model and it shows all the chassis styles (there are four) and where the battery should e located. Be gentle with the mother board.
where on the dell website can i find the selection of the battery....im lost in the dell website...i have a dell optiplex 780 small form factor and when i start my machine it tells me that the voltage battery low , thanks