Bosch BAT240 HDOP Blue Core 24-Volt 2-2/5-Amp Hour NiCad Pod Style Battery Fully compatible with all Bosch Cordless Tools Innovative BLUECORE cooling rods placed between battery cellsTo absorb heat and protect battery from damage Battery cells stay cooler during tool operation and charging BLUECORE Batteries can charge in 30 minutesOther batteries can take up to 3 hours to charge when hot