I got this

Hyperion LG V20 Battery BL-44E1F (2 x Battery + Charger) https://www.amazon.com/dp/B00AQ4X2WS/ref=cm_sw_r_cp_apap_frhMIxrcvC9zb

I rotate them in at least weekly with the OE one. Never had a problem with them, never got an "invalid battery" message.

Edit: ok well looks like it's out of stock now. Nevermind.