Li-ion on L1T (interesting)

[Buck91]

So, I contacted Fenix directly about the input voltage spec for the L1T V2 Q2 and recieved and interesting reply:

Hello Josh
Thank you very much for using Fenix light.
The L1T V2.0 can work with 14500, but as manufacturer, we don't suggest the customer use it in this model, because it will possibly affect the LED and circuit if you use for a long time. For the absolute safety, we recommend you use the 1.5v – 1.7v battery.
Any more question, feel free to contact.
Best regards!

Sincerely Joyce
Fenix Service Team
Website: www.fenixlight.com
Tel: 86-0755-29631183
MSN: [email protected]

Has anybody actual had an issue (failure, malfunction, etc) while using a 14500 li-ion in their L1T v2.0 q2? It would seem very feasible (and in fact I've done it for short periods without issue), but I really don't want to see a $45 light go

 

[UnknownVT]

Has anybody actual had an issue (failure, malfunction, etc) while using a 14500 li-ion in their L1T v2.0 q2? It would seem very feasible (and in fact I've done it for short periods without issue), but I really don't want to see a $45 light go

OK not a Fenix L1T v2.0 Q2... and I am not too sure of the exact cause - but I have a L1D-Q5 that has had 14500 usage (as well as obviously mostly NiMH) -

There has been a noticable tint shift toward violet/blue and the emitter seems to show some browning.

The L1D-Q5 now -

L1D-Q5 some 10 months ago (when compared to the L0D-Q4) -

Heads compared - notice the browning/singed look on the left (new head on right)

I have used the Fenix L1D-Q5 to discharge 3.7V Li-Ion 14500 so this means the light was on until the battery showed low output - although I do not recall the light getting hot - there seems to be evidence that the emitter did overheat causing the browing/singed look.

 

[Buck91]

Interesting... Thats definately good enough to convince me not to use li-ion in my L1T!!