... is to be used in the clothing Heating system for heating jacketThe product has such characteristics as thin, ... control.Battery packs4,800mAh-7.4V (two connect in series)Using 4,800mAh Li-ion battery, it is light, big ... to use.3,500mAh-7.4V (two connect in series)Using 3,500mAh Li-ion battery, it is light, big ... about flexible heaters, please contact our sales engineers. Heating System for Heating Jacket