Improving runtime, power and speed, the M12 XC High Capacity REDLITHIUM Battery provides two times the runtime and increased performance as compared to the M12 Compact REDLITHIUM battery pack in all M12 tools. Milwaukee REDLITHIUM batteries are the next generation in lithium-ion technology. Compatible with all products in the M12 Cordless Tool System, REDLITHIUM battery packs provides unmatched runtime, performance and durability for the professional tradesman.