Battery Grip Kit for Nikon D800, D810 Digital SLR Camera Includes Vertical Battery Grip + Qty 4 Replacement EN-EL15 Batteries + Rapid AC/DC Charger + More!! ENEL15 EN-EL15 Li-ion Rechargeable Battery for Nikon D800 D810 Digital SLR Camera Battery Specifications - Energy Storage Capacity: 2200 mAh /Voltage: 7.0 volts, Chemistry: Li-ion 100% Memory Free Super Long Time Recording battery has a one-year warranty This battery is fully decoded and will function just like an original Nikon ENEL15 Battery Includes Vertical Battery Grip + Qty 4 ENEL15 2200mah Batteries + Rapid AC/DC Charger + Micro Fiber Cleaning Cloth