For batteries
https://budgetlightforum.com/t/-/8030
I tested this charger not long ago, I thought it was good.
fixed the battery link for ya benckie, here's the batteries:
https://budgetlightforum.com/t/-/8030
3.55 amps sure seems really low to me... 
now I'm even more torn...
I wonder if the aliexpress one's are knockoffs?
Well it can be hard to tell these days, but really 3.55 amp on 2 x 18650 is not bad as that's 7.10 amp if it was a single cell light, the torch is ment to be digitally regulated at 7.5 amps so one would think 3.55 is good. But the tr-3t6 is digitally regulated at 3 amps and wil pull this on 2 x 18650,s so around 6 amps if it was a single cell. But we know the driver is around 5.6 amps. So then one could think if the tr-j12 is regulated at 7.5 amps and if it was like the other genuine tr lights it would be 6 or 7 amps on two cells. All I know is mine is bloody bright and eats batteries and needs to be run on 3 cells for decent run time and for the sake of the batteries as even on redilast or Panisonic cells it is drawing more then 2C p 2 x 18650's and is putting out more then 3 times the light of my tr-3T6.