Folks, A complete amateur here... I want to put some heating elements in a pair of mits for my golf cart. I have purchased a cheap flexible set of heating elements, one designed to give a motorcycle heated grips, but need some help on the battery requirements. The pads (x2) are 12v and state 15watts per pad... I would like to keep them on for 4 hours at a time. Ideally I want to power it with a Li-ion quick recharge solution. I was going to have a stab at the maths, but will avoid embarrassing myself... Have I provided enough info and can anyone suggest the right spec of battery? Another question, if I was to try and use the 12v golf cart supply what would be the key considerations - Is this likely to fry the pads or do you think this would be a massive drain on the battery life (It lasts about 5 hours at present - Motocaddy M3) Thanks for any help.... Paul.