Imalent RT35 Flashlight Review

Preface

Imalent has impressed me with some of their lights (Hello: DX80) and less so with others (the capacitive switch lights).  So I was excited when I saw this light get listed on FastTech, and FastTech agreed to send one out for review.  This is a very new light, and I’m very excited to have one for testing!


Official Specs and Features

Versions

Just the one!

Price

The light is MSRP of $125ish, but is priced at just over $100 at FastTech right now.  There’s also a kit which includes cells, for $150.  If you don’t already have cells, this could be a good option.  The cells I used in this review were sponsored by LiIonWholesale, and are protected MJ1 cells.  (Buying from LiIonWholesale would end up being a little cheaper than the kit, to be sure.)


Short Review

I now have a few handheld (4×18650, that is) throwers.  I think this one’s my favorite.  It’s not perfect, but I like it a whole lot.

Long Review

What’s Included

  • Imalent RT35
  • Nylon pouch
  • Charge cable (proprietary)
  • Lanyard
  • Spare o-rings (2)
  • Paperwork

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Package and Manual

This light is in a cardboard box, just like some other big Imalents I’ve had. There’s a plastic handle.  The box has a sticker label with lots of printing, including a photo of the light and specs etc.

The manual has similar information as the box, and is a good manual.  Printing is not great but the information is fine.
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Don’t forget to remove this film over the lens!  It peels off cleanly.
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Build Quality and Disassembly

I’m satisfied with the build quality of this light.  Normally I say I don’t like 4-up lights with cell holders, but I see why they’re preferred.  Lights like this one (with no cell holder) are harder to get tightened down properly.  That’s the case with this light, though I still managed just fine.
Otherwise the build quality is great.  I like all the fins on the head and body.  I like the way they look, and they’re functional too.
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The RT35 has a metal switch on one side and the charge port on the other.  For what it’s worth I never had any issue confusing these two things.  They’re different enough in feel to be distinguishable.  I’ll talk more about the switch later but suffice to say that [while it’s not perfect] I love it.

I didn’t disassemble the light further than this.
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The knurling isn’t aggressive at all.  Couple that with what I mentioned about tightening the parts together (and that this doesn’t have a cell holder), it can take some effort to get the parts tightened down properly.  In this case I wouldn’t ask for knurlier knurling, but maybe that the tailcap unscrewed instead of the head/body.
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Size

Officially: 161mm (length) * 86 mm (head diameter) * 51 mm (body diameter).  As far as can light throwers, this light is pretty small!

Here’s the RT35 beside the DX80.

And beside the Convoy S2+.

Retention

Imalent includes a directional nylon pouch.  The bottom is open, and the light hangs out a little.  The straps are double, with one being velcro and detaching at the bottom.

There’s a lanyard included, which connects in these holes in the tailcap.
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The lanyard is an interesting and unusual.  It’s quite a long piece of cord, and seems as though it’s meant to wrap around the head temporarily during carry, and can almost function as a hand hold.  It’s an interesting design, and to be sure, I like it.  At least as much as the “normal” lanyards, in any case.
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Here’s an example of what I mean that this lanyard can be used as a handle.
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Power

The RT35 is powered by four 18650 cells.  These cells need to be quite long, but capable of fairly high current.  The light pulls 15A on Turbo.  Fifteen Amps.  That’s not trivial, so you’ll need good cells.  The cells I’m using here are specials from LiIonWholesale, sent just for this review.  Here’s that cell.  It’s a protected MJ1 cell, and seems to work well in this light.
Be aware that the light actually needs a quite long cell.  I had a set of 3 Efest cells that were long enough.  But button top 30q cells were not long enough.  And the design of the light isn’t conducive to using magnets (ask me sometime how I know that).
So either buy the expensive cells from Imalent in the kit, or buy these less expensive ~10A continuous protected MJ1’s for it.

Since these cells are in parallel, the light will actually operate on any number of cells.  However Turbo isn’t accessible with a single cell, but starting with 2 cells Turbo is available.  This could be cell-quality dependent, as 15A is a lot to pull from a single cell.
Here’s a runtime on Turbo.  I measured the 30 second output at around 2000, which is exactly what the spec claims.  And that’s after quite a tumble from the initial output.  Imalent says the light is temperature controlled, and when the light hits 55 degrees Celsius, the output steps down.
At the end of the runtime, the light just shuts off cleanly with no fade out.  The switch has an indicating feature, that will turn red, then turn blinking red when the cells are at 3.2V.  At around 3V (per cell) the light shuts off.
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Here’s a runtime on High, which also has a very quick stepdown, but is stable after about 15 seconds.  This is approximately 1250 lumens, for around an hour.  Then stepdown to 550 lumens for another hour +.

The charger is unfortunately proprietary, but of course the cable is included.  The connector is USB.  USB 3.0 would have been fantastic, to harness faster charging.  But this light already charges at almost 2A, even with just USB 2.0.
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Charging isn’t steady at 2A, but does stay over 1.7A for over 4 hours.  Total charge time is around 7 hours to completion, and the cells were around 4.14-4.15V when charging stopped.  There is no trickle to the cells once charging stops.
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Charging works on any type cell.  It’s the charge connector itself that’s proprietary, not the cell requirement.

User Interface and Operation

The user input comes from a single switch.  It’s solid metal, and rectangular and very unusual.  Very clicky.  The indicator (red and green) is above (below? beside? perspective….) the switch, and stays on when the light is on.  Green means the cells have a good charge, but red means the cells are <3.2V.
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Here’s the green indication.
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Here’s a UI table!

State Action Result
Off Click On (Mode Memory)
Any Double Click Turbo
On Click Off
On Hold Mode Cycle (LMMH)
Off Hold (>3s) Lockout
Lockout Hold (>1s) Unlock (and on, to Low)
Turbo Double Click Strobe

Modes

Mode Mode Claimed Output (lm) Claimed Runtime Measured Lumens Tailcap Amps
Turbo 2350 8+162m 1988 14.90
High  1500 3h45m 1350 10.00
Middle 750 6h10m 848 4.00
 Middle Low  350 12h45m 381 1.65
 Low  50 60h16m 109 0.40

LED and Beam

The emitter of choice is a Cree XHP35 HI.  This is a 12V emitter, which means the driver has a boost circuit, and also explains why it pulls 15A on Turbo – gotta get that voltage up to 12!
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The reflector is smooth.  Very smooth.  One of the smoothest reflectors I can remember!
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Of course up close you can see the donut from perfect collimation, very visible at near distances. This shouldn’t bother you in a light like this, as it’s a thrower.

Tint vs BLF-348

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Beamshots, Runtime, and Lux Measurements

Imalent RT35
Emitter Cree XHP35 HI
Emitter Notes
Cell 18650×4
Glamour Shots Beamshots [0.3″, f/8, ISO 100, 5000k]
Runtime Chargetime
LVP? Yes (~3.0)
Claimed Lumens (lm) 2350
Lux (Measured) 11120 lux @ 6.058 m
Candela (Calculated) in cd 408096.9
Throw (Calculated) (m) 1277.6
Throw (Claimed) (m) 1338

Random Comparisons and Competitive Options….

This isn’t a category of lights lacking competition.  There are at least 7 lights with the same emitter and similar throw, but not a single one of those has on-board charging.  Even if you disregard the charging because it’s proprietary (in connection), this light is still not a bad deal because of it’s fairly small size.

Conclusion

What I like

  • Size
  • Output is great (though technically not up to spec)
  • I love the big metal switch!

What I don’t like

  • Fairly specific cell needs
  • Can be hard to tighten the head

Up Next

I’m not committing to anything (except at least one Nitecore next week!)

Notes

  • This light was provided by FastTech for review. I was not paid to write this review.
  • The cells used in this review were provided by LiIonWholesale.
  • This content originally appeared at zeroair.wordpress.com.  Please visit there for the best experience!
  • Whether or not I have a coupon for this light, I do have a bunch of coupons!!  Have a look at my spreadsheet for those coupons. It’s possible to subscribe and get notifications when the sheet is edited!!

Author: zeroair

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