PCBs and over discharge protection voltage

[ThinAirDesigns]

I read in the stickies that lithium ion 18650s should not be discharged below 3.0v and should be retired if discharged below 2.9v.

With this in mind, why is it that all the PCBs available in the below links (and most everywhere else) list the over discharge protection voltage trigger at from 2.3v to 2.7v?

http://www.all-battery.com/2S_Li-Ion.aspx

http://www.batteryjunction.com/pcb.html

Thanks
JB

 

[HKJ]

That information is not entirely correct, try reading here: http://lygte-info.dk/info/BatteryLowVoltage UK.html

 

[ThinAirDesigns]

Thanks HKJ - that makes sense.

Given my use (large pack, small drain), I would say I need to pick one with one of the higher trigger voltages.

Thanks
JB