The Lenz lithium packs rcB 1800 and rcB 1200 are compact, rechargeable battery packs compatible with all Lenz Heat Socks, Heat Vests, Heat Pants, and Heat Gloves. Designed for work, sports, and cold-weather leisure, they deliver up to 20 hours of warmth and connect easily via push-button snaps. Heat levels can be controlled directly on the pack or via the free Lenz heat app—ideal when packs are worn under layers. Each set includes two lithium packs and a USB charging cable with charge indicator. Choose the rcB 1800 for extended heat duration or the rcB 1200 for a slim, efficient power solution. Features: Rechargeable Connection of the batteries to the respective product using snaps Heat output can be controlled with the free smartphone app (9 heat settings) or directly on the lithium pack (3 heat settings). Small, light (approx. 80 grams) and compact (8.5 cm x 5.5 cm x 1 cm) Charging cable with USB connection
