Using UnProtected Cells in a High Drain Flashlight

chip100t

Well-known member
Joined
Apr 1, 2021
Messages
68
On a single cell flashlight with:
- a protection circuit, you can run you unprotected cells without worrying too much
- no protection circuit, you'll have to remove your batteries, to check the voltage

As for multi cells flashlights : don't put unprotected cells in there!!
Why no multi cell flashlights, I have this light that uses two unprotected 21700 cells. Should I be worried. D1B84E72-935D-4962-9527-61849AA1901D.png
 

Atmar

Member
Joined
Sep 15, 2021
Messages
10
Location
Philippines
I think the problem is these cells when they over discharge are not stable

When there is 2 and they are unbalanced it causes reverse charging and they can explode
 

vicv

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Joined
Mar 22, 2013
Messages
1,318
Location
Southern Ontario
On a single cell flashlight with:
- a protection circuit, you can run you unprotected cells without worrying too much
- no protection circuit, you'll have to remove your batteries, to check the voltage

As for multi cells flashlights : don't put unprotected cells in there!!
Meh, you're fine in multi cell flashlights. Check your cells once in a while. If they always discharge at the same or close to the same rate, they're fine. Everyone should have a DMM
 

vicv

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Joined
Mar 22, 2013
Messages
1,318
Location
Southern Ontario
Do you mean you actually fried the LED? That is very unlikely but it in no way is determined by whether it's a protected cell or not
 
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