Amazon.com : BM Premium EN-EL9, EN-EL9A Battery for Nikon D5000, D3000, D60, D40x & D40 Digital SLR Camera : Electronics
Amazon.com : Synergy Digital Camera Battery, Works with Nikon Coolpix 8700 Digital Camera, (li-ion, 7.4V, 850 mAh) Ultra Hi-Capacity, Compatible with Nikon EN-EL1 Battery : Electronics
Amazon.com : Wasabi Power Battery for Nikon EN-EL3e (2-Pack) and Nikon D50, D70, D70s, D80, D90, D100, D200, D300, D300S, D700 : Electronics
Amazon.com: Nikon EN-EL18d Battery : Electronics
Amazon.com: Wasabi Power Battery for Nikon EN-EL18d and Nikon Z9, D4, D4S, D5, D6 : Electronics
PSA: Third-party batteries are not working with the Z8. : r/Nikon
Amazon.com: Synergy Digital Camera Battery, Works with Nikon D5500 Digital Camera, (li-ion, 7.4V, 1250 mAh) Ultra Hi-Capacity, Compatible with Nikon EN-EL14 Battery : Electronics
Amazon.com: Synergy Digital Camera Battery, Works with Nikon D5500 Digital Camera, (li-ion, 7.4V, 1250 mAh) Ultra Hi-Capacity, Compatible with Nikon EN-EL14 Battery : Electronics