Add low voltage cutoff to unprotected cells?

[hammockjockey]

I love the Mag85's light & runtime I get out of these 3 4000mah IMR 26650's, but they're unprotected. I have run one of the cells down so far as to ruin them on two occasions now. I have plenty of room in the bottom of my 3D Mag & am wondering if there is something I can make to open the light's circuit when the voltage drops below 9 volts or so? I've added my name to alanb's sales thread for a regulated incan driver for something more ideal, but that looks to be a loooong way out. Maybe a diode or something? Thanks for any ideas!

 

[COAST]

IMR cells have a "safe" chemistry therfore it's not necessary to add a protection circuit....... Because it's already safe. If I'm wrong, please, someone correct me.... :twothumbs

 

[hammockjockey]

I really was just thinking of more of a cutoff to prevent over discharging the cells.

 

[fivemega]

IMR cells have a "safe" chemistry therfore it's not necessary to add a protection circuit....... Because it's already safe. :twothumbs

Safe doesn't necessarily means you can not overcharge or overdischarge them.

I really was just thinking of more of a cutoff to prevent over discharging the cells.

You can use regulated switch with pre set low voltage warning or cut off.

 

[Billy Ram]

I haven't had any problems with my IMR26500s or IMR26650s. I try to put them on the charger after they see much use but once in a while I have one start to go dim. I put it down and grab another light. When you run one all the way down it needs to see the charger soon.
Billy

 

[hammockjockey]

I found another incan driver that I can hopefully get much sooner than alanb's.

http://www.candlepowerforums.com/vb/showthread.php?t=231489

Looks like I just need to order a Kiu socket to put that under.

 

[hammockjockey]

Another road block....

JM has no regulators in stock