The advanced EGO POWER+ 56V 2. 0AH battery uses industry-leading Arc-Lithium technology to deliver Power Beyond Belief and is compatible with all EGO outdoor power equipment. Keep-Cool battery technology keeps each cell cool for long life and work in the most extreme conditions. All EGO out door power equipment comes with a 5-year limited and 3-year limited on EGO POWER+ System battery packs and chargers. Please contact EGO Customer service Toll Free at 1-855-EGO-5656 any time you have questions or claims.