Powerextra 2 x Nikon EN-EL9 High Capacity Replacement Battery Compatible with Nikon D40 D40x D60 D3000 D5000 Cameras Battery Type:Li-ion / Voltage:7.4V / Capacity:2000mAh Includes 2 batteries to power your Nikon D40 D40x D60 D3000 D5000 Camera No memory effect, batteries can be charged or discharged at any time without harm Superior quality cells have overcharge, over discharge, over voltage and short circuit protection for better battery life. Products come with our Powerextra is 30 days money back,and 24 Hours friendly customer service!