TrustFire TR-A9 Battery Drain Problem

I bought a TrustFire TR-A9 several months ago from WB. I tested it when I first received it and really liked it…and on the shelf it went without batteries.

Well…2 weeks ago I got it out again. Left the batteries in it for 4-5 days…went to turn it on…and nothing. Batteries ended up showing “0.00” on my voltmeter. WUT? Tried another set of batteries…same thing. I’ve heard of parasitic drain…but this is crazy!

Anybody have one of these lights? Have you had any issues? What is going on here? You can’t use thread lock-out because of battery configuration…so that’s not a solution.

I have this light… and I put 32650 battery in it… it drain but since the battery have a higher capacity it didn’t go to 0V
but the problem now… for reason unknown the light doesn’t even turn ON anymore :_(

Hmmm…I’ve seen a couple other posts about this issue…but have yet to see a solution. Bummer…cuz it’s a nice light/form-factor.

Me too,

So I put battery in only when I will use it.

I guess there are two versions of this light. There seems to be a 14500 version (2s2p, 8.4v) and a 32650 version (1s1p, 4.2v). I assume kronological has the 14500 version and DayLighter has the 32650 version.

http://www.fasttech.com/product/1424810-trustfire-tr-a9-2-cree-xm-l2-t6-5-mode-800-lumen
http://www.fasttech.com/product/1384800-trustfire-tr-a9-cree-xm-l2-t6-5-mode-500-lumen-whi

Does this parasitic drain problem affect both lights?

What would cause it to drain so fast…the switch? Perhaps replacing it would fix the problem?

Could be a bad cell too?? I have had a few cheaper quality rechargeable bats do that just sitting on the shelf a few weeks!! When installed in my lights, I try and lock out my tail caps, if possible. Otherwise remove batteries. I also read that its not good to leave them sitting in the charger cradle.

I always wonder if the “next mode memory” drains any on the battery? I also wonder if lights that monitor the cell voltage drain the battery in this process?? Does your light have any of these features??

Do you guys have any ideas?

This type of light (e-switch aka momentary switch) always has an closed electrical circuit. (“Clicky” lights break that circuit at the switch.). A well designed e-switch driver will drain the batteries incredibly slowly. This one is less well designed. Perhaps in the future a replacement driver could fix this issue.

Will you guys post macro pictures of the drivers in your lights?