REDLINK intelligence: our battery circuitry provides optimized performance and overload protection using total system communication between tool, battery and chargerBest-in-class construction: offers long-lasting performance and the best protection against jobsite, weather and environmental conditionsFuel gauge onboard: displays remaining run-timeVersatility: powers all 175-plus M18 cordless solutionsCompatible with all M18 toolsM18 and M12 rapid charger charges packs up to 40% fasterIncludes: M18 High Output Battery Pack 12.0Ah(48-11-1812), M18 High Output Battery Pack 6.0Ah (48-11-1865) & M12 and M18 Multi-Voltage Rapid Battery Charger (48-59-1808)