Used Celestron PowerTank LithiumCondition: This is a used PowerTank Lithium battery in great working condition with little signs of wear. It includes the power cord, the AC main charger, and the velcro tripod strap. Description: Portable power pack for your computerized Celestron telescope using Lithium Iron Phosphate (LiFePO4) chemistry Smaller, lighter, safer, and easier to maintain than lithium ion and sealed lead acid designs Up to 2000 charge cycles four times more than lithium