The Gerbing's 12V 4 Amp Lithium Polymer battery pack weighs just over 9.5 ounces / 270 grams and powers the Gerbing's heated garments that need no more than 48W (4 Amps). It comes with a charger and a neoprene case with adjustable belt. The newest version of this battery has a 5V USB port for charging or powering a GPS, iPhone, iPod, mobile phone, etc..
The battery pack has a built-in temperature controller with three heat settings and comes with a remote control you can attach to your keychain. The LED-light indicates the remaining charge of the battery. The charger BAT-LI-124CG charges the battery in about 5 hours and has at least 500 charging cycles. To connect the heated gloves to this battery you need a long Y-cable. The heated socks and heated insoles already come with this Y-cable.