The Li-Ion Battery Pack for Leica Rugby CLH & CLA Lasers is a Li-Ion battery that is designed for Leica Rugby CLH horizontal laser and CLA all-rounder laser. These batteries can be recharged while being inserted into the Leica laser or when removed. It reaches a full charge in approximately five hours if completely empty. It can be operated from -20°C to +55°C/-4°F to +131°F.