I've been using these without a hitch...
Brand NEW OEM Lg Mobile Bl-45b1f Standard Battery 3000mah for Lg V10 NON Retail Package https://www.amazon.com/dp/B01AASN2U6/ref=cm_sw_r_cp_apa_9eWxBb81A1EE4
I just bought two for ~$7.50 per....I think I have seven total. For camping trips, etc.... Here's the Amazon link...
Brand NEW OEM Lg Mobile Bl-45b1f Standard Battery 3000mah for Lg V10 NON Retail Package https://www.amazon.com/dp/B01AASN2U6/ref=cm_sw_r_cp_apa_i_Lt0hBbSYG2TTR
The batteries are cheap but the OEM LG CHARGER is something like $30. There are cheaper alternatives, as usual, on Amazon and eBay...