The Industry's Most Innovative Battery brazil's industry-leading PW Core 12 Lithium Batteries contain an innovative temperature management system that results in both longer run time and longer battery life. Each cell is surrounded by revolutionary phase change materials to keep the battery functioning at its best, all so you can power through any project.brabraCharge Up AnywherebraWhether you're working on the go or bringing your tools to help a friend, power up your devices along the way using built-in USB ports with PW Assist mobile charging.brabraMore About This Product: bra- 4.0Ah High performance battery with PW Assist Mobile Charging USB port bra- Longer run time and battery life with PW Core 12 Lithium Battery bra- Green LED fuel gauge displays battery capacity with after-glow bra- Pair with any SKIL PW Core 12 product bra- Mobile charging output: 5V 1.0AbrabraAbout SKIL PW Core 12 Technology:braThe innovative PW Core 12 system is built for longer battery life, faster charging, and convenience. Industry-leading PW Core 12 Lithium Battery technology utilizes a patented cooling system; each cell is wrapped with temperature management material to keep the battery cool and powering on for 25% longer run time and 2X battery life. PW Jump™ charges the battery up to 25% in just 5 minutes, providing enough power to blast through up to 100 screws.* And PW Assist Mobile Charging provides on-the-go USB port power for mobile devices. These innovations fuel the powerful performance of the PW Core 12 system. Bra*Based on 2.0Ah battery