Hi everyone , i just made a simple battery mod with 4 Li Ion (18650) cells .
I just added 4 cells in parallel with the og battery , those cells are directly soldered the positive and negative of the og battery before the protection board .
The enclosure is 3d printed , i used 4 3100mah 18650 cells , a small voltmeter and a button .
So now i have a grand total of about 16,800mah of capicity , i got 10h on Zelda botw with mid brightness and wifi on ,and 23h on Terraria.
The device weight 620g with joycon , i can still dock it on my small dock and it also fit in my switch bag .
There is still one "bug" , the battery pourcentage on the system is slightly off , it sometimes says 1% but there is still plenty on battery and also says 100% of charge but the battery are still charging . (FIXED)
Thats why i added a voltmeter to see the real voltage of the battery and it works flawlessly now.
![001.JPG 001.JPG](https://gbatemp.net/data/attachments/174/174420-f1b60db46e68c1684641da736e7171e4.jpg)
![002.JPG 002.JPG](https://gbatemp.net/data/attachments/174/174426-291389e5be06a18fc91c9c5a9e7632b1.jpg)
PS: sorry for my bad english , im french .
EDIT : It take 11h to charge from 0% to 100% the console.
The battery indicator is fixed until you completely charge it and discharge it about 15 times . like this --->(FIXED)
EDIT 2 : Its safe to mix different battery capacity if they have the same voltage when connecting them together , they are in parallel and you dont exceed the max C rating per cell. --->HERE
EDIT 3 : This is a proof to show that its possible and it works flawlessly , but i should have gone for two 18650 cells instead of 4 , 640g is heavy for some people and 16000 mah is overkill xD
I just added 4 cells in parallel with the og battery , those cells are directly soldered the positive and negative of the og battery before the protection board .
The enclosure is 3d printed , i used 4 3100mah 18650 cells , a small voltmeter and a button .
So now i have a grand total of about 16,800mah of capicity , i got 10h on Zelda botw with mid brightness and wifi on ,and 23h on Terraria.
The device weight 620g with joycon , i can still dock it on my small dock and it also fit in my switch bag .
There is still one "bug" , the battery pourcentage on the system is slightly off , it sometimes says 1% but there is still plenty on battery and also says 100% of charge but the battery are still charging . (FIXED)
Thats why i added a voltmeter to see the real voltage of the battery and it works flawlessly now.
![IMG_20190802_160419.jpg IMG_20190802_160419.jpg](https://gbatemp.net/data/attachments/174/174421-465f76aad4a217bba6866cbe4db16391.jpg)
![IMG_20190802_160439.jpg IMG_20190802_160439.jpg](https://gbatemp.net/data/attachments/174/174422-0173a3739a8089cfabee6fcf0eaa471a.jpg)
![IMG_20190802_160507.jpg IMG_20190802_160507.jpg](https://gbatemp.net/data/attachments/174/174423-f9e304fd8e8d4e05f7d3069d04eae5f3.jpg)
![IMG_20190802_160606.jpg IMG_20190802_160606.jpg](https://gbatemp.net/data/attachments/174/174424-a43fb76ea2dae61580ded82b6d49fa96.jpg)
![IMG_20190802_160627.jpg IMG_20190802_160627.jpg](https://gbatemp.net/data/attachments/174/174425-cb293a51724ef0a460049916bcd4f5ef.jpg)
![001.JPG 001.JPG](https://gbatemp.net/data/attachments/174/174420-f1b60db46e68c1684641da736e7171e4.jpg)
![002.JPG 002.JPG](https://gbatemp.net/data/attachments/174/174426-291389e5be06a18fc91c9c5a9e7632b1.jpg)
PS: sorry for my bad english , im french .
EDIT : It take 11h to charge from 0% to 100% the console.
The battery indicator is fixed until you completely charge it and discharge it about 15 times . like this --->(FIXED)
EDIT 2 : Its safe to mix different battery capacity if they have the same voltage when connecting them together , they are in parallel and you dont exceed the max C rating per cell. --->HERE
EDIT 3 : This is a proof to show that its possible and it works flawlessly , but i should have gone for two 18650 cells instead of 4 , 640g is heavy for some people and 16000 mah is overkill xD
Last edited by Laytor,