Clamshell Battery & Cable 3.7 V Socks BT - 2 Pack

Mobile Warming® uses only the highest quality Lithium-Ion batteries to ensure long-lasting power and battery life. Our batteries are designed to power your Mobile Warming product for hours ensuring you stay warm and comfortable. The 3.7volt Premium Bluetooth® battery is exclusive to our Premium 2.0 Merino Socks, control sock temperature and monitor battery level right from your phone.