Skil 20V PWRCore 20 4.0Ah Lithium Battery - BY519601

Longer Run Time and Battery Life —The PWR CORE 20 Lithium Battery has an innovative temperature management system to keep the battery cool and powering on through your project. Power Up 20V Tools —Pairs with any SKIL 20V product. Always Know Charge Status—Green LEDs show status, so you always know how much charge is left.