about a year ago i bought two 110ah batteries to replace the 1 old one (which wasnt very old anyway). took the old one off and put it on charge for a few days. checked the voltage a few hours after taking it off charge and it was around 12.8v if i remember correct. checked it again today and its reading 12.3v.....been on charge once in between about 6 months ago. is it worth fitting it back on the M/H as it will give me a 330ah bank?