The Bosch GLM-BAT 3.7V Lithium-ion Battery delivers greater runtime than standard AA batteries for some Bosch BLAZE™ Laser Measures, allowing adaptability and ease of use. It provides about 60% more runtime than AA batteries at normal room temperature, and the GLM-BAT is not as affected by cold temperatures as alkaline batteries. The battery features convenient USB charging. It can charge using various 5V power supplies, such as power adapters, PCs, laptops or portable power banks, for maximum flexibility. And it charges fast, takes only 15 minutes to charge, for 30 minutes of laser operation.