A2 voltage cutoff for CR123´s ?

[LED61]

The last run on SF 123´s marked 10-2016 on my A2 was to my impression incredibly short, and I had never bothered to test resting voltage after the run until now. The SF bats measured 2.85 V each, does anyone know if this is the correct voltage where the regulator can no longer power the incan lamp ?

 

[Carpenter]

Was the batteries tested with or without a load? I bet if you would test them with a load, the voltage would dip to a point where it would make more sense that the incan stopped working.

 

[LED61]

Was the batteries tested with or without a load? I bet if you would test them with a load, the voltage would dip to a point where it would make more sense that the incan stopped working.

Oops yes sorry I forgot to mention it is open voltage with no load, where these batteries typically show 3.25V when new. Still, under load it would probably stil be above 2.0V ? and is 4.0V is probably not enough for the MA02 ?

 

[DM51]

The A2 drops out of regulation when there is ~25% capacity left in the cells. Run-time of the incan is ~50 mins before this happens.

 

[Hawkeye62]

Yes, this is the correct no-load voltage. Mine stopped powering the incan and checked with the same voltage. It will still drive the LEDs though.

 

[LED61]

Thanks for the answers everyone.

 

[js]

Open circuit voltage of CR123A cells really tells you almost nothing about their state of charge. Sad but true.

If you're not getting the right amount of runtime with your SF123's, SureFire will warrantee the remaining cells in the box(es) you bought. Call CS.

 

[WildChild]

Open circuit voltage of CR123A cells really tells you almost nothing about their state of charge. Sad but true.

If you're not getting the right amount of runtime with your SF123's, SureFire will warrantee the remaining cells in the box(es) you bought. Call CS.

JS is right! When the batteries "died" on my E2L (original batteries). One was reading 2.87V OV and the other around 2.70V OV. The 2.87V would drop to almost 0V under 100 mA load and was really dead. I could use the 2.70V cell for 10-15 minutes on high on my L1 before output dropped. The best is to test them under load. CR123A will show an OV of around 3V for most of their life.