Amazon.com : Synergy Digital Camera Battery, Compatible with Nikon Coolpix P510 Digital Camera, (li-ion, 3.7V, 1100 mAh) Ultra High Capacity, Replacement for Nikon EN-EL5 Battery : Electronics
2 x Power2000 EN-EL5 Battery for Nikon Coolpix P5900, P520, P80, P100, P4, P3 | eBay