I bought the keyboard addon with the extra battery and that has increased my og PinePhone’s battery life a lot. So maybe give that a try. The downside is that it makes the phone pretty big and it might not always fit in your pocket. But it might be useful while traveling for example.

For PinePhone Pro there is also some proprietary firmware, which is supposed to help. Are you using that? I probably wouldn’t want to install it, but it’s supposed to increase the battery life to that of the original PinePhone.