For controllers and small devices like this, they could just go with standard AA batteries like Xbox’s.
I’m not sure if the manufacturer will be required to make the replacement batteries themselves. For older laptops, you could buy an external battery from a 3rd-party which worked just fine.
I have big hands so I’d have to go with the Xbox 360 and Xbox One’s controller. The DualSense is very good, too. I’d give it to the DualSense for the haptic feedback and vibrations, but they’re both great!
For controllers and small devices like this, they could just go with standard AA batteries like Xbox’s.
I’m not sure if the manufacturer will be required to make the replacement batteries themselves. For older laptops, you could buy an external battery from a 3rd-party which worked just fine.