Original Galaxy S battery was getting weak? Order a new battery from Amazon for 13€. Battery arrives, pop the back of the phone off, pull battery out (just like that, no soldering), push new battery in. Push the back of the phone back on, done.
New battery in and it had more mAh than the original one. Despite overclocking that phone it ran a day longer after the replacement.
Or, better yet, you should be able to hot swap the battery, which means that you can change one half of the battery, then the second half and the phone won’t shut down at all. Foldables make it easier since they already use 2 batteries, 1 for each half. Just wire them up in parallel and the voltage won’t drop when one is taken out for replacement by the user.
Back in the day this was even better:
Original Galaxy S battery was getting weak? Order a new battery from Amazon for 13€. Battery arrives, pop the back of the phone off, pull battery out (just like that, no soldering), push new battery in. Push the back of the phone back on, done.
New battery in and it had more mAh than the original one. Despite overclocking that phone it ran a day longer after the replacement.
Or, better yet, you should be able to hot swap the battery, which means that you can change one half of the battery, then the second half and the phone won’t shut down at all. Foldables make it easier since they already use 2 batteries, 1 for each half. Just wire them up in parallel and the voltage won’t drop when one is taken out for replacement by the user.