This replacement battery provides 18 V LiIon power for compatible cordless power tools. It is a 4000 mAh capacity pack designed as a direct replacement for part numbers 4932386853, 4932373556, 4932373551, 4932352667, and 49240171M18. Built to match the form factor and connector of the original battery, it is ready to install in tools that require an 18 V LiIon pack. Key benefits capacity for longer runtime: 4000 mAh capacity helps you complete more work between charges. LiIon chemistry: lightweight, compact batter y with stable power delivery and no memory effect. 18 V compatibility: designed for tools that operate on 18 V and use the listed part numbers. Direct replacement: matches the original battery bay and connector for easy installation and reliable performance. Consistent power delivery: maintains steady voltage to support tool performance during use. Key attributes Functionality: replacement battery for compatible 18 V cordless power tools. Compatibility: fits tools that use part numbers 4932386853, 4932373556, 4932373551, 4932352667, and 49240171M18. Size and voltage: 18 V nominal, 4000 mAh LiIon capacity. Material: LiIon cells constructed for standard tool use. Performance: delivers reliable power for compatible tools requiring an 18 V battery with 4000 mAh capacity. Use cases Drilling and driving on woodworking or metalworking projects where longer run time between charges is beneficial. Construction or home improvement tasks that require sustained cordless power for drills, drivers, or impact drivers. Tool maintenance or replacement scenarios where the original battery has degraded and a direct 18 V LiIon replacement is needed to restore performance. This product description stays aligned with the original specifications: 1x Battery Replacement for 4932386853, 4932373556, 4932373551, 4932352667, 49240171M18, with 4000 mAh capacity, LiIon chemistry, and 18 V operation for power tools.