Emisar D1 / D1S review

What’s the maximum current draw of any configuration of this or the D1 or D1s? I’m guessing a 4 LED will draw more current than the XPL? So far I’ve seen that the D1S tops out at 6A with the XPL I haven’t seen anything on the 4 up configuration.

Actually, given DBCustoms’ comment about 12 Amps or more possible, What I really want to know is what’s the best 18650 to use in these beasts. The 3 best ones in HKJ’s review do fine at 10A but don’t like 15 A at all.

Thanks.

Quad’s can run up to 12A or more, where a single emitter isn’t usually so high. The new emitters are breaking new ground though, with the SST-40 capable of well over 9A and the XP-L2 also up there towards 10, surprising really.

The highest current draw I’ve seen to date in a flashlight is a triple XHP-70.2 I built, pulling 32.2A from 2 iJoy 21700’s.

Thanks! I edited the OP before I saw your reply. What do you think the best 18650 battery for these D series is given that the top 3 in HKJ’s review could handle 10 A but wouldn’t survive 15?

Thanks.

What is the actual size (Diameter and depth) of the aluminum reflector inside the D1 and the D1S?

Thanks!
AlexGT

Hi Dale, Where did you get your SST-40, How close to the die did you cut and how much did the tint shift? Thanks!

Any word on when the D1S will be available?

It’s available already through M4DM4X/Neal’s Deals.

There are quite different current draws between the D4 (reports of up to 20A) and D1/D1S (6A). I would assume that the usual suspects 30Q/VTC6/VTC5A would be cream of the crop in the D4. Given the lower current requirements in the D1/D1S I would expect that performance with Sanyo GAs wouldn’t be too far behind the higher drain batteries. However this is purely theoretical - I’m sure others can chime in!

Stephen nailed it, survival seems such a harsh word, if a cell can’t deliver 15 to 20 Amps in a quad then it will give what it can, it’s not gonna die just because the 4 dies want more. A Panasonic PF may give 8 or 9A where the 30Q gives 18A, both survive, the light just makes less output on the lesser cell.

VTC5A is probably the top dog, with VTC6 and 30Q hot on it’s heels. Efest 3000mAh in the dark metallic purple is right up there with them. The LG HE-4 also is an excellent performer. The LG HE-2 isn’t far behind nor is the 25R. The Efest 35A is still an excellent and viable choice. There’s a lot of cells that will work well in the D4, all of these will get the light too hot to hold in short order.

I did this cell test in an HD2010 variant light equipped with the Luminus SBT-70 emitter. Notice how some cells can produce very similar output in lumens at quite different current draw, yet all cells tested worked in the light, albeit with varying results. So a lesser cell can be used to control max output and thus, heat. If you’re loaning a hot rod light, equip it with a lesser cell to ensure the noob doesn’t damage anything. The lesser cell doesn’t die, it just doesn’t deliver the max power. The only case where survival may come into play is with a protected cell, it’s possible these turn off and won’t come back on if a high discharge activates the protection circuit. Good protected cells won’t do this, but there are a lot of different protection circuits on the market…

I would be interested to see any comparisons in output between VTC6/5A/30Q and GAs in the D1S when people start to receive them. (I need to order a batch of 18650s and would prefer the latter for use across my different lights if they perform well).

I must have misunderstood HKJ’s graphs. I thought that the exponential temperature rise of over 50C (nothing over that temperature shows but it’s clear the temperature rose more than that) meant the battery was going to overheat if that amp draw continued. Very few batteries stayed under 50C at 15A draw and none did at 20A. The Sony VCT6 did the best

http://lygte-info.dk/review/batteries2012/Sony%20US18650VTC6%203000mAh%20(Green)%20UK.html

Here are the 3 that did the best at 10A draw, with the Enercig beating out the others in mAH in testing down to 3.0 V.

Sanyo ncr 18650 GA

Samsung inr 18650 35E

Enercig 18650 3450

http://lygte-info.dk/review/batteries2012/Common18650Summary%20UK.html

Reviewing those graphs and doing some background checking it looks like the enercig is the VTC5A and it wins the 20A discharge wars. Thanks for the help!

I have the D1 xpl hi V3 1A set at 70 degrees c and showing 29 degree pcb indicated temp for both tests.[ambient 22 c]

I tested the VTC6 versus the GA

The VTC6 at start 1182

at 30 secs 1108

at 1 minute 1075 lumens

The ncr 18650 GA at start 1107

at 30 secs 1074

at 1 minute 1021 lumens.

As you can see there is a little difference in output. I personally like the sony the best as it can run most of my lights and the difference in capacity is very little between the two.

Differences of 100 lumens at this values are not perceptible.

Thanks for the info. So the GAs are only –3.1% to –6.3% less.

Any info when will be D1S available on intl-outdoor? And something else colors in the future?

Almost any decent cell should be fine in the D1 and D1S. Output on turbo may differ by small amounts, but usually not enough to be perceptible. They shouldn’t have any significant issues putting out that much current.

The D4 is another story. It tries to draw enough power to damage lesser cells. Usually the thermal regulation will reduce the output before anything bad can happen, but you could still run into issues with a first-batch model before regulation was added, or in really weird situations like if you held the button in momentary mode at turbo while wearing a heatproof glove.

In either case, good cells are certainly recommended, but it’s not as important with the D1 and D1S.

Here it is :+1:

http://intl-outdoor.com/emisar-d1s-thrower-p-926.html

$40… What a bargain… :smiley:

I’ll be ordering one when Richard from Mountain Electronics get’s them in. BTW, my Cyan D4 is being delivered today :slight_smile:

How much would a domed emitter change the beam profile of the D1?