Expand your 40V collection with this powerful and compact 2.5Ah 40V HART Battery. This powerful battery features Lithium-Ion technology to give you long-lasting and fade-free 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. The 2.5Ah 40V HART Battery has a slim design that lends itself to a more comfortable experience by reducing fatigue. This 2.5Ah battery is compatible with all HART 40V outdoor tools. You will never run out of runtime while having this additional HART Battery on hand Get All Power, No Gas with the HART 2.5Ah Battery. This battery is sold as a single battery and does not include a charger or a tool.