My married 25r's dropped below nominal voltage..

[Sil3nt]

When I put them in my nitecore d2 it read 3.29. Are they ruined?

 

[pdib]

depends on what batteries you're using. and you can google the specifications. Most of the batteries we use, the limit where you're actually harming the battery (where you might consider not using them anymore? or "flashlight time") is around 2.5V.


here's a "fer example" .. .


HG2 Spec Sheet

and some text from below that chart:

"2.0V is considered the lowest possible safe cut-off voltage for discharging any 18650 cell. Most 18650 cells cut-off at 2.5V. This 0.5V difference translates to a higher milliamp hour rating, but at expense of utility. (We see a similar parallel between the LG HE2 and HE4 fast discharge conditions).
Most people do not want to go below 2.5V for safety concerns, and if they do the low voltage environment does not provide ideal performance."

This doesn't mean that you should vape your batteries down to 2.5V. Rather, 3.5V is a good range for long term battery life. But, it does mean that you don't need to worry if you vape your battery down to 3.1-3.2v now and again. Not great, but not a big concern either.

 

[crxess]

Nope

 

[VHRB2014]

My sig 150`s cut off is right at 3.25, and they are fine. They are 25R also. No problems.

 

[sonicbomb]

Once you dip below 3v you are in the danger area, below 2.5v will most likely result in damage.

 

[Georgie-1-Lung]

3.2 is the recommended minimum rate I believe. 25r's are prob the safest batteries out there and should be safe until under 3 as sonicbomb stated.