eli5: How come an old Nintendo DS battery lasts forever and will play for a long time on a charge but modern phone batteries deteriorate so much within a few years?

Question

My 15 year old well worn DS lite seems like the battery capacity hasn’t changed at all over time, but my 6 year old Galaxy S6 has a very noticeable quickly draining battery. I think processor and system load has something to do with it but they are both lithium ion I believe. Me no get

In: 1

Answer 1

I assume you use your phone much more often than your DS and therefore have more recharge cycles. Most people also leave the phone charging even though the battery is fully charged (there is a protection in place which prevents overcharging).

Still, this will wear down the battery over time.