Great review as usual :+1: . What a nasty Tint…… Now I know why X45 got a nickname “Green Lantern” :confounded: .
I am fairly certain that the bundled batteries are Sony VTC6, since the internal resistance, capacity and discharge curves all match those perfectly. The batteries are also a very good match to each other.
Thanks for another excellent review, both manufacturer and users should be delighted with the kind and amount of information you provide! I enjoyed the read. 
Fantastic review - way to go the extra mile!
Wow!!, great light and great review. Thanks. _ b
Mine should be here in a few days. I did not see an option for tint when I preordered from HKE. To be honest idk which I’d prefer so I guess it’s good I don’t know what I’m getting because I’m bad at having buyers remorse. I’m sure I’ll love which ever one I get. I was really hoping it had slotted battery insertion instead of a carrier which reduces weight and makes it much easier to swap but aside from those 2 things I can’t wait to play with this thing.
Thanks for this info. Mine on order. Will have it in the first week of May. Will test it against the Imalent DT70.
Did test both of them. The Imalent does has a furher throw by at least 100 ANSI meters. The Acebeam X45 is the flood king between them.
Some more info regarding this review of the X45. According to Chris from acebeam.com this is the 6500K flashlight and not the 5000k. The 6500k flashlight using Cree XHP70 P2 1C LED with four cores. This LED has the problem that the lighting color shows a light green spot light according to the engineers of Acebeam. The 5000k version does not show the greenish color in the spot light.
Correction: Not PWM on firefly, just some very mild pulsing at 600 hertz in the output and impossible to see with a naked eye.
Excellent review. I’m wondering how the cool white version looks?
Great review with nice details !
In high mode - 4000lm is comfortable to hold in hand for extended period? Is the high mode safe to use unattended ? (to leave like a candle and drink beer )
I have the K60 and at 4000lm after 5 minutes is pretty hot (depending a lot of ambient temperature) , safe to use unattended on level 1700lm.
Excellent review, Thanks!
After getting a fast photosensor with 14 ns rise time (Thorlabs DET36A/M), I measured some switching noise on low and mid in addition to firefly. The frequency is so high that there’s no chance of ever seeing it, but maybe some serious slow motion cameras might be affected.
Low (109 kHz)
Mid (430 kHz)
The sensor reveals some other interesting output anomalies from various lights…
Interesting. Can you tell what fraction is the ripple compared to the total light output?
It can be visually approximated, since the center horizontal line is zero output.
May I know where is the regulations forbid to take a picture in such building? I’m living in CA as well!
Great review as usual!! Many thanks maukka 
I have a little question: maybe have you done a measure of the intensity vs angle for this light?
Like you did with AB EC50 gen II , EC60 and Olight R50 ?
Haven’t done that unfortunately.
Well done for this review. Will you perhaps also do one on the up coming X80?
Haven’t heard from Acebeam so no plans yet.
Yes,we know.In California,first they shoot,then they ask…