This starter kit includes a 12V MAX 3 Ah Lithium-Ion Battery, 12V MAX 5 Ah Lithium-Ion Battery and a 12V to 20V MAX compatible Lithium-Ion Battery Charger for extended runtime for your tools.
These batteries are made with built-in fuel gauge 3-LED charge indicator while the charger's Yellow LED illuminates for Hot/Cold Pack Delay, so you'll always know when your battery is ready for work.