The HART 40V 5.0Ah battery is the perfect way to expand the runtime and capabilities of your 40V tools so you can get larger jobs done in a shorter amount of time. This powerful battery features fade-free Lithium-Ion technology to give you long-lasting, consistent power you need to tackle any project that comes your way. Also, the On-Board Fuel Gauge allows you to quickly check the charge at any moment so you will always know when it is time to switch batteries. The HART 40V 5.0Ah battery has a robust design to add to the durability and longevity of the tool. This 40V 5.0AH battery is compatible with the full lineup of HART 40V tools. You will have a lot more runtime having this additional HART battery on hand! Get ALL POWER, NO GAS with the HART 5.0Ah Battery. This battery is sold as a single battery and does not include a charger or a tool.