En-el14 En-el14a Battery+led Usb Dual Charger With Usb Cable For Nikon D3100 D3200 D3300 D3400 D3500 D5600 D5100 D5200 P7000 - Digital Batteries - AliExpress
The last D3100, D3200, D5100, D5200 and P7700 firmware update killed third party battery compatibility - Nikon Rumors