Battery questions

[Silence]

I have the purple efest 2500mah 35A (pulse) 20A continuous batteries. At what voltage is it no longer useable/ unsafe to use? I have a multimeter to check it just not sure what my numbers should be.
Thanks,

 

[joelmora89]

Most people don't let the go below 3.6 ish

 

[Silence]

Thanks a ton!