Digital Nc Super High Capacity 'Intelligent' Lithium-Ion Battery For Canon EOS 5D Mark III SLR Camera - Lifetime Replacement Warranty Super High Capacity (Non-OEM) Battery (2000 Mah) Chemistry: Lithium-Ion (No memory loss) Integrated microchip for communications with camera and charger, prevents overcharging, & lengthens battery life Includes Lifetime Replacement Warranty