I bought an Oxford heated vest about 12 months ago. Its not wired to the bike it has a lithium battery pack. Problem is on full power it won’t last more than 2 hours. I’m just wondering if its possible to wire it to the bike. This is the battery pack
http://www.championmotouk.com/avacti…er_Pack_Lg.jpg

its a 7.4v 2200mhj Li-ion battery. I’m guessing that because the bike is 12v I need some way of reducing the voltage. Any ideas ?

Its £55stg for a second battery but thats a pain carrying and having to charge two battery