Sony A1II Fake batteries with the latest cameras

[DJT]

In 2019 I switched to Sony, got myself a couple of 3rd party batteries to go with my A9. I immediately got the warning about using a non genuine battery. Concerned I may miss a shot when this warning popped up (shooting wildlife and sport) I decided to buy myself 2 "genuine" Sony batteries. I had no further issues or warnings, batteries have worked fine for the past 6 years. Then in June I decided to get myself the A1 MK 2. When I put one of my Sony batteries in that I was using in the A9, I started to get warning messages about non genuine batteries. Puzzled, I did a little research only to find the ones I purchased 6 years ago were actually counterfeit Sony batteries (not 3rd party or genuine Sony ones) and the A1 MK 2 didn't like them at all, where as the A9 had no issues with them.

On Saturday I decided to use one of the non genuine ones in the A1 MK 2 as I was shooting all afternoon at a sporting event and also going out on a photo walk Saturday evening. I put the non genuine battery in and immediately got the warning message. I acknowledged it and carried on shooting. After about 2 or 3 minutes I got a "Battery Exhausted" message up and that was that (all my batteries had been fully charged before going out.) I ended up running down the pitch to my camera bag to quickly put in a genuine battery and continue shooting the game. When I got home I put the battery into my A9 and it works fine, saying it has 81 % charge remaining.

So, it would seem that possibly the newer Sony cameras/latest firmware are less tolerant of non genuine batteries. Just a heads up to anyone considering buying non genuine batteries.