> I really wish rechargeable batteries had interchangeable form factors like normal batteries.
They largely do. For example, the famous 18650 which powers all kinds of devices from power banks to laptops to cars.
If what you’re referring to is their common inclusion into proprietary battery packs, there are some technical reasons for that difference, like cell balancing, safety protections, etc. While it could be possible to engineer some (but not all) of these concerns out of the equation, you’d end up with a more expensive larger and heavier product.
They largely do. For example, the famous 18650 which powers all kinds of devices from power banks to laptops to cars.
If what you’re referring to is their common inclusion into proprietary battery packs, there are some technical reasons for that difference, like cell balancing, safety protections, etc. While it could be possible to engineer some (but not all) of these concerns out of the equation, you’d end up with a more expensive larger and heavier product.