Any improvements to battery life? I feel like my pixel 8 pro battery is dying a lot faster now. I would like to trade it in for a pixel 9 pro xl, but it's kind

Any improvements to battery life? I feel like my pixel 8 pro battery is dying a lot faster now. I would like to trade it in for a pixel 9 pro xl, but it's kinda hard/impossible to do in Brazil. I got a good deal from best buy but you need to have a US issued document to trade your phone in, bummer. Any plans to ever sell it in Brazil?