TrustFire X9 - Thoughts and beamshots

Looks like you got yourself a good one! Mine only draws ~ 1.3A with my best cells (Xtar 18700).

DMM leads sure do make a difference, so make sure to keep that in mind. The cheap HF leads measured less than 1.0A while the Equus is measuring around the common draw of ~1.8A.

I think the ebay X9 can use 2x CR123 as the reason it only pulls 1.7A on 1x18650. like my Solarforce skyline 1 which is really brighter using 2xCR123 as compared to 1x18650. Can anyone confirm this without getting any problem? I contacted the ebay seller and they confirmed this can use CR123(not 16340).

Easy DMM calibration:

Build yourself a light with an 8x7135 driver

Insert fresh, fully charged battery

Measure current. If it is not 2.8A then your DMM is off.

My x9 was pulling 2.4A (before it popped) and it was from ebay. Now it's 2.8 A and neutral. :)

this is the problem of china made flashlight. the inconsistency of quality

I dont know wether its inconsistant quality or just user differences with MM and tailcap readins , mine reads 2.4 with my MM using heavy leads and my SF MPP1 pulls 0.78a on same fresh SF batt and leads ...theres just to much room for differences ie batt types MM's leads ect seems everyone will always get differing readings unless we all sync'd with same batt's MM's ect ..lol..that aint happenen ...either way it throws a ton'a light and im real happy with it ... it was an ebay purchase not MF ..I wont hesitate on purchase due to tailcap readins of others or you'l never buy because theres always differences

I think we are dealing with all of the above.

Current draws vary between samples of the same model even with regulating drivers, more so with direct drives. Internal resistance between multimeters varies a lot and even the thickest leads cannot entirely obviate the current reduction that the inclusion of the meter is imposing.

So yes, the comparison between readings carried out by different people on DD flashlights is unreliable.

The lottery continues. Wink

Have you tried it. I am tempted but don't want to blow it up

I get 2.2a with short leads on an xtar18700. Only 1.8a on normal leads

I can't, I dont have new CR123 batteries, all are already used and at half its voltage.

+1 Wiith my old HF DMM I got low readings. With my new, better, DMM I get 2.6 on my eBay x9.

yeah go's to show its wise to use tailcap readings as a rough guide only , my x9 's a great light to say the least , took it out bush last night for a shootout along with the Solarfoce MMP 1 head on L2T body ,both loaded with fresh SF protected cells ....both lights a good throwers the MMP1 nice tight clean beam plenty'a throw for my use hunting , the x9 fantastic to just light'em up throws as far as the MP plenty'a usefull spill but no so much as to greatly hinder ya night vision . both lights are very well made and look to be water thight


just took these readings now using
4.21 v solarforce protected Battery
my MultiMetre thick leads
x9
2.2a

same battery

MPP1
0.72a

on my sons MM thin leads

x9
1.17a

______

MPP1
0.50a

I can lend you a brand new pair! Laughing

Just now sold my Spare X9 and my other X9 will be modded with 2.8A 4.2v driver. Still I will be using the stock X9 driver in my P60 dropin. hehe

I was naive and tried 2xCR123 before I ever tried 18650 because I didn't have any around at the time. They were at 3V and it ran without any poof. I only had it on for maybe 15 seconds.

Did the brightness seem like it was 2.6A when you were getting low readings? I ask , because i get 1.6A with my HF DMM and the output is not very bright . I don't want to buy an expensive DMM and have high readings and the output not show it.

I work in the Oil Fields over Oil Wells.

The meter I have is made by Simpson and is used every day. I costs about $500.

Anyone in the oil fields will recognise the name

http://www.slb.com/

And yet....I worry about tail cap readings

@gen1.3 My x9 is very bright and has been since I got it. There is no doubt that it is driven at 2.6. That’s why I decided to get a new DMM. I knew it was reading low. Still read low until I got good leads.

Ian, I have tried 2 CR123a's with no problems. It puts out about 40K lux compared to 36K with an 18650.

It is noticeably brighter when shining on far away objects. The longest I've had it on at one time is 30 sec. Ive already gone thru a pair of cells and I'm on my 2nd set.

Make sure you check the current first to see if your X9 can handle it.

What DMM and leads do you have?