I took the gamble of buying Patona branded versions of the LP-E6P and LP-EL this weekend and they arrived today. The LP-EL works fine in my EL-5 (which luckily doesn't drain batteries overnight) and the LP-E6P works in the R5II.
The R5II detects it as an LP-E6P, I can register it in the camera and both pre-capture in stills at 30fps and 8k60 RAW video recording worked without issues. I'm now charging it through the USB-C port in the battery itself.
Since they arrived less than half an hour ago, I can't say anything about capacity or longevity, but at half the price of their OEM counterparts they have some goodwill
The R5II detects it as an LP-E6P, I can register it in the camera and both pre-capture in stills at 30fps and 8k60 RAW video recording worked without issues. I'm now charging it through the USB-C port in the battery itself.
Since they arrived less than half an hour ago, I can't say anything about capacity or longevity, but at half the price of their OEM counterparts they have some goodwill