High accuracy, excellent workmanship.
Is also not too hot during charging (Quick Charger UltraFire WF-139).
Also seems to have a really low self-discharge.
I use this battery in my Fenix TK35 R5 (820 lumens) - once got the lighting time stopped: 2 days in use mostly in the high mode,
Overall, the battery has held more than 2h - Fenix is a luminous period in HIGH mode of 1.5h to.
Certainly also this battery for Fenix PD31'll use, but only comes in the next few days.
From me an absolute buy recommendation.
