Hi, Can anyone out there help me find the battery dimensions of a 'Tudor' STR 720 leisure battery. It fits in a Mclouis Lagan 410 (04 Plate). I’m fairly certain the battery has had it, after one weeks charging on a camp site plus a 4 hour drive only to find it’s lost its charge 20minutes later. I put this down to lack of use as it spends most of it's time in a secure compound. I’m considering purchasing tow identical leisure batteries and put the second one under the passenger seat but not sure how to connect them together. I would welcome some advice on this please. Regards, Philip.