iPhone 7 boot loop after battery change

I have an old iPhone 7 that’s been in a draw for a few years as the battery was discharging very quickly- I bought a replacement battery to fit but never got round to it so it’s also been sat in the draw for a few years. Just changed the battery and now it’s stuck in a boot loop- black screen to white screen with black apple and back to black.

Trouble is there are photos on the phone that I need to backup so I don’t really want to go into DFU mode (if that will even work) and wipe it.

Any ideas on what I could try? Would a new replacement battery which should have charge to begin with get it out of boot loop?