Get industry-leading performance and the power of gas in PWR CORE 40?Lithium technology. The PWR CORE 40? 2.5Ah Lithium Battery uses patented technology with an innovative temperature management system that results in longer run time and longer battery life. Each cell is surrounded by temperature management material to keep the battery cool and powering on. Use the SKIL 40v battery to power up all SKIL PWR CORE 40?tools. PWR CORE 40? LITHIUM BATTERY – This 2.5Ah 40v lithium battery fuels the power and performance of the PWR CORE 40? system LONGER RUN TIME BATTERY LIFE – Industry leading PWR CORE 40? lithium battery technology wraps each cell with cooling material to keep the battery powering on for 25% longer run time 2X battery life ALWAYS KNOW CHARGE STATUS – Green LEDs show status, so you always know how much charge is available 15-MINUTE CHARGING – Auto PWR JUMP? charges the battery from 0-30% in just 15 minutes (based on a 2.5Ah battery) ONE BATTERY, MANY TOOLS – Pairs with all SKIL 40V power tools