Modern batteries are virtually maintenance free,so unless you have a specific reason for opening the cells,I would leave it alone.If you are worried about the type of battery fitted,then buy yourself a genuine Vauxhall battery which is totally sealed for life.Not as expensive as you may think and certainly cheaper than Halfords.I think the smallest type now made for this model is 50ah.It is not necessary to reset the radio code on these late model corsa as the code is held in the vehicle electronics.hth

I haven't checked a cell in a battery for 30 years, not since Vauxhall batteries came with the green magic eye thingy. If a low maintenance battery runs dry it's usually faulty anyway. I suspect the cover over the positive connection is simply clipped into place - usually two stubs that push fit down into holes in the battery body in the case of a genuine GM battery.

Edited by Victorbox on 28/05/2011 at 09:38