Hardware Replacing the GBA SP battery

MetoMeto · Jun 4, 2020

Hi!

So i have "GBA SP ags-101" model (the back-light one).
So i never use full brightness and i use the lowest of 2 levels, and its bright enough, so the battery wont drain as fast as it would on full!
I also have "EZ Flash IV" flash cart, and i know flash-carts consume a bit more power than legit carts, and i can tell when playing.
Still, it has a decent capacity considering back-light and a flash-cart, but i wanted to make it last longer.
I used My Nintendo DS fat (the original model), battery and put it into GBA SP 101. It reads 850mAh, 3.7V
GBA SP 101 has the same battery but smaller "mAh" like 600mAh so i figured additional 250mAh will make my GBA last longer!

I was wondering how much longer. Id like to know, first, how do i measure capacitance of the battery, in what condition it is etc, and also, is there some equasion or online calculator that can calculate, based on info (or if you can do it for me, cause im not that good in math lol), how long will my GBA SP last
with this "new" battery?

Thanks!

Ryccardo · Jun 4, 2020

Ideally you would need to figure out a typical load (current) of your console + game + any other accessories, fully charge the battery, apply an equivalent load while measuring the voltage, and count how much time it takes to go down to an arbitrary minimum voltage!

A DS battery was higher capacity than an SP battery when new, however any original battery is sufficiently old to break the otherwise reasonable logic of "1st party must be better" - this of course doesn't imply most/all 3rd party ones aren't old

MetoMeto · Jun 4, 2020

I didn't quite get that....
What should i do again (noob guide)?

Hardware Replacing the GBA SP battery

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