Hacking 6400mAh Battery Mod for Switch Results+Guide

DaLZy

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nice but battery from 2017? nope for me.
It's general guide. You don't neccessarily have to use the same cells as me. Anyway, depending one when you bought your switch, it might have a battery from 2017 in it anyway.
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@DaLZy
Can you please post the full guide here, not just publish a link to outside?
Is there a issue with that? I'm new here. It seems you can view the entire thing without leaving the gbatemp with the way the link is embedded.
 
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The Real Jdbye

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Hello. I wrote the Guide below on how to upgrade the battery of your switch without changing the shell:

Nice mod. Batteries made for RC could be a better fit, if you can get the right size, since they can tolerate high current applications and use the more common 3.7V chemistry instead of 3.85V, so you wouldn't be wasting battery capacity.
 

Lamcza

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It's general guide. You don't neccessarily have to use the same cells as me. Anyway, depending one when you bought your switch, it might have a battery from 2017 in it anyway.
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Is there a issue with that? I'm new here. It seems you can view the entire thing without leaving the gbatemp with the way the link is embedded.
yeap and you put in there again a 6/7 year old battery :X smells like wasting money to me but good and fun project otherwise
 

Lamcza

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He is getting a extra hour of battery life, how is this a waste?
1693653121280.png

BUuuut like i said cool project just dont use batteries this old.
 

The Real Jdbye

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BUuuut like i said cool project just dont use batteries this old.
As long as the battery hasn't been connected to anything while in storage, it probably still has some charge left in it so it's fine to use.
If it fully drained while in storage, the battery could be damaged.
Good idea to measure the voltage of any battery that has been in storage for a long time. If below 2.5V, it should not be used (often you may be able to resurrect such a battery with a slow trickle charge but at best battery life will still be affected to some degree), but if above 2.5V it should not have taken any damage.
 

Lamcza

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As long as the battery hasn't been connected to anything while in storage, it probably still has some charge left in it so it's fine to use.
If it fully drained while in storage, the battery could be damaged.
Good idea to measure the voltage of any battery that has been in storage for a long time. If below 2.5V, it should not be used (often you may be able to resurrect such a battery with a slow trickle charge but at best battery life will still be affected), but if above 2.5V it should not have taken any damage.
dude, it was almost 7 years ago... someone who sells it probably revived it somehow i doubt that these batteries were charged to avoid damage for 7 years straight, perhaps I have trust issues :D.
 

DaLZy

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Nice mod. Batteries made for RC could be a better fit, if you can get the right size, since they can tolerate high current applications and use the more common 3.7V chemistry instead of 3.85V, so you wouldn't be wasting battery capacity.
Any capacity gained from a 4.2v chemistry would be offset by how low the capacity density on RC batteries are. Just measured the one RC battery I have. 15mm2/mah vs 6.5mm2/mah for the phone batteries. The Switch VRM would sooner blow up than need the 25C on RC batteries. Anyways the capacity is not "wasted" anyway, charging to a lower voltage will prolong service life
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Nice.. mine I modded my switch lite with 8000mah.i parallel 2 4000mah battery
Just interested, have you tested the capacity of your battery or checked the reported capacity in Hekate? My mod is also technically 8000mah, but 6400mah in reality. I imagine the lite will get more usable capacity as it charges up to 4.35v
 

Rodel

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Just interested, have you tested the capacity of your battery or checked the reported capacity in Hekate? My mod is also technically 8000mah, but 6400mah in reality. I imagine the lite will get more usable capacity as it charges up to 4.35v
Actually not just 8000mah its 8555mah of total here is my hekate
IMG_20230902_211447.jpg
 
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Illuminaticy

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Ooooo I like this. Well written guide and a killer idea, will give me motivation to use my switch again - battery life just kills the fun for me. Not sure why I never researched a battery swap but here we are.
Curious what batteries @Rodel is using as well

My childhood DS still charges to 800MAH and lasts far too long for its own good - and you (OP) seem to have an understanding of what you're doing and I'm sure you tested as needed. Focusing on the seven year old battery is silly.
 

hartleyshc

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Is there a issue with that? I'm new here. It seems you can view the entire thing without leaving the gbatemp with the way the link is embedded.


I think the issue is more for archival purposes.
There's a lot of dead links on the internet. Who knows if/when reddit ever decides to change anything, there are more subreddit revolts, or reddit simply decides to ban/delete the SwitchHacks subreddit.

5 years from now, someone could be looking back over this thread and have no idea the steps you took.

So the preferred way would be to copy/paste the content from the Reddit post in your original post here, and then just give a link to the reddit thread. That way everyone here can see the information, even if reddit is deleted tomorrow. But at the same time, give the links and let people read the thread and comments on the reddit side as well.
 

DaLZy

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I think the issue is more for archival purposes.
There's a lot of dead links on the internet. Who knows if/when reddit ever decides to change anything, there are more subreddit revolts, or reddit simply decides to ban/delete the SwitchHacks subreddit.

5 years from now, someone could be looking back over this thread and have no idea the steps you took.

So the preferred way would be to copy/paste the content from the Reddit post in your original post here, and then just give a link to the reddit thread. That way everyone here can see the information, even if reddit is deleted tomorrow. But at the same time, give the links and let people read the thread and comments on the reddit side as well.
Honestly this version of the Guide will probably not be relevant for too long. There's a lot more I could do to get way more capacity(I know for a fact 11000mAh is possible). Truth be told I am a bit lazy to upload all the images again, this time to this site, and everytime I copy my post from reddit it seems to like to add extra spaces between my words that i have to painstakingly filter out.
 
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The Real Jdbye

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Honestly this version of the Guide will probably not be relevant for too long. There's a lot more I could do to get way more capacity(I know for a fact 11000mAh is possible). Truth be told I am a bit lazy to upload all the images again, this time to this site, and everytime I copy my post from reddit it seems to like to add extra spaces between my words that i have to painstakingly filter out.
It's the same issue when you try to paste text into the editor on Reddit. Their editor is just broken. I think I fixed it by turning the markdown/WYSIWYG editor off.
 

Kitsune_sempai

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Actually not just 8000mah its 8555mah of total here is my hekateView attachment 391642

Did you simply stack two batteries on top of each other and wire them to the same BMS?
I want to attempt this but since I'd like to keep my flip cover I wanted to know it causes bulging or does it fit after some case trimming/shield cutting.
Thanks!
 

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