Well, I got impatient and ordered the lithium battery last night. I'm afraid I may have made a mistake in doing so, since I ride a lot in the cold weather. My stock battery is 10 Ah/180 CCA. The Ballistic 12 cell is 20 Ah/400 CCA. I'll report back after I have a chance to thoroughly test it out in cold weather.
Rechargeable lithium-polymer battery that lasts up to 10 hours. Take battery life into consideration when buying a pair of quality heated socks. And, when it comes to giving you hours of continuous warmth and comfort, ThermoGear Rechargeable Heated Socks stay ahead of the game. The compact battery pack design ensures ease of use anytime, anywhere.