I bought two perfine off Ebay and IMO they have underperformed.

I often have to charge throughout the day to make it. I think I bought them two years ago though so maybe that's just expected max effectiveness life and I'm being unfair :/

I might opt for one of these Shenmz on amazon

https://smile.amazon.com/Battery-SHENMZ-3300mAh-Replacement-BL-44E1F/dp/B07TM2JQFH/ref=sr_1_3?crid=29OTW3O44EMS2&keywords=lg+v20+battery&qid=1661800959&sprefix=lg+v20+battery%2Caps%2C122&sr=8-3

I really wish someone would make a modern phone w/ these features though! I can't give up my removable battery, SD storage & IR Blaster, those are hugely important features to me. Might be opting to boot a custom ROM soon, slack keeps telling me Android 8 isn't gonna be supported further so I gotta find a way to get Android 10 or 11 on here...