RIDGID 18 Volt Compact Lithium-Ion Battery 2-Pack. RIDGID introduces the 18V 2.0 Ah Lithium-Ion Battery Pack (2-Pack). These 2.0 Ah batteries will give the user up to 2X more runtime and 2X longer life compared to standard lithium-ion batteries. Each of these new batteries will be 10% more compact and 10% lighter compared to the previous model (R840086). Best of all, these 2.0 Ah batteries are 100% compatible with all RIDGID 18V tools and lithium-ion chargers. Chargers sold separately.