The write up on this battery states it is a calcium battery, then that is a lead acid. The Write up translation is very bad, I would be a bit dubious about buying this battery for long term use.My campervan leisure battery appears to have given up. It went flat and it refuses to recharge. It has been on charge for about 23 hours and is reading 10.6 volts and 34% charge. I need an A type/class battery as I only go on campsites now and again, so I looked on eBay and found this Link . It says its an A type/class battery for only £89.95. Does anyone have any experience of this battery? I think I might buy it even if it sounds too good to be true.