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Now on Kickstarter: new X-tra battery solution for Nikon cameras - Nikon Rumors
X-tra is a new battery solution for Nikon cameras that has already raised over $100k on Kickstarter. The battery is compatible with Nikon z6, z6 II, z7, z7 II, Z50, D500, D600, D610, D750, D780, D7000, D7100, D7200, D7500, D800, D800E, D810, D810A, D850, P520, P530, and V1 cameras: Additional...
nikonrumors.com