Imalent DX80 32000 lumen monster

531 posts / 0 new
Last post
dchomak
Offline
Last seen: 2 hours 59 min ago
Joined: 03/17/2012 - 20:10
Posts: 3828
Location: Connecticut

About the heat and the runtime, I did some back of the envelope calculations. I collected some specs and data and wrote them down.

Now, from experience, I have noticed that these guys use the term “theoretical” when they state lumen vs actual.
It’s easy to figure out where their stated 32,000 lumen comes from, that’s just 8 LEDs times 4022 lumen each

Here is one way to calculate “theoretical” run time until 50 degree Celcius kick down. I will assume here that all heat is sinked into the body of the light and that there is no delta T from the star to the tailcap. Also I will assume there is no heat shed via convection or radiation during. (there would be some, and that would extend it somewhat)

Using the data I collected and something I call “dimensional analysis” I came up with a formula using relevant numbers from above and came up with this.

71 seconds until the body of the light reaches 50 Celsius, up from 25 room temperature.

If I count the wattage emitted out the front using 683 lumens = 1 watt, that would decrease the heat wattage from 256 to 209.15 Watts.
That would extend the runtime to 105 seconds. That is a lttile more, but not the stated 3 minutes, 180 seconds.

Even so, my calculations are very liberal and would not reflect real world results. All kinds of factors would reduce the runtime till kickdown.
Here are some that quickly come to mind.
Decrease in efficiency of the LED as temps go up.
Added heat from the batteries.
The Delta T from the LED and star to the body.
etc

As I mentioned, there are a number of other unaccounted factors that would increase the runtime, but not by that much IMHO.

Also I could be wrong in the use of my numbers and assumptions.

I think we all know that this light can not perform quite as they state, but WHO CARES, I want one!

hIKARInoob
hIKARInoob's picture
Offline
Last seen: 6 hours 38 min ago
Joined: 08/28/2016 - 08:15
Posts: 2176

I have to strongly disagree with you. The first part is definitely not what you call a back of the envelope calculation.
This is what is called a two ply toilet paper calculation. Silly

dchomak
Offline
Last seen: 2 hours 59 min ago
Joined: 03/17/2012 - 20:10
Posts: 3828
Location: Connecticut
hIKARInoob wrote:
I have to strongly disagree with you. The first part is definitely not what you call a back of the envelope calculation. This is what is called a two ply toilet paper calculation. Silly

LOL,

That’s even funnier than you think.

That’s actually a napkin from McDonalds. With the quality of the food, it might as well be the same thing

hIKARInoob
hIKARInoob's picture
Offline
Last seen: 6 hours 38 min ago
Joined: 08/28/2016 - 08:15
Posts: 2176

dchomak wrote:
That’s even funnier than you think.

That’s actually a napkin from McDonalds. With the quality of the food, it might as well be the same thing

- Ancient Chinese proverb -

Wipe yer bum, wipe yer mouth
What goes in must once come out.

charles lin
charles lin's picture
Online
Last seen: 39 sec ago
Joined: 03/09/2016 - 17:08
Posts: 203
Location: SoCal, US

The first batch of DX80 doesn’t look good, already three reports received none working or defective light in two days! Facepalm



hIKARInoob
hIKARInoob's picture
Offline
Last seen: 6 hours 38 min ago
Joined: 08/28/2016 - 08:15
Posts: 2176

Explains the delay. Imalent had to make sure non of the lights were fully functioning… sigh. Sick

NikolaS
NikolaS's picture
Offline
Last seen: 2 hours 25 min ago
Joined: 02/07/2014 - 13:26
Posts: 871
Location: intersection of all roads

Where did you find this reports and pictures?

Some link?

hIKARInoob
hIKARInoob's picture
Offline
Last seen: 6 hours 38 min ago
Joined: 08/28/2016 - 08:15
Posts: 2176

NikolaS wrote:
Where did you find this reports and pictures?

Some link?

Different source, but at the bottom there is a video of the DX80 seemingly not functioning too well, although it could be the capacitors discharging: http://www.tieba.com/f?kw=%CA%D6%B5%E7

rizky_p
rizky_p's picture
Offline
Last seen: 14 hours 9 min ago
Joined: 03/01/2011 - 05:06
Posts: 761
Location: Indonesia
charles lin wrote:

i didnt know it came with battery pack? i thought it is using 8×18650.

hIKARInoob
hIKARInoob's picture
Offline
Last seen: 6 hours 38 min ago
Joined: 08/28/2016 - 08:15
Posts: 2176
rizky_p wrote:
i didnt know it came with battery pack? i thought it is using 8×18650.

There should be 8 × 30Qs in there. It’s 4S2P charging, so they probably don’t want people to stick their entire collection of 18650 cells collected throughout the years in this light.

Franz
Offline
Last seen: 17 min 17 sec ago
Joined: 04/03/2013 - 04:09
Posts: 438
Location: Brasil

Imalent strikes again

rizky_p
rizky_p's picture
Offline
Last seen: 14 hours 9 min ago
Joined: 03/01/2011 - 05:06
Posts: 761
Location: Indonesia

kind of disappointing though, i wish that they use standard individual 18650s and battery carrier instead.

hIKARInoob wrote:
rizky_p wrote:
i didnt know it came with battery pack? i thought it is using 8×18650.

There should be 8 × 30Qs in there. It’s 4S2P charging, so they probably don’t want people to stick their entire collection of 18650 cells collected throughout the years in this light.

Pchri12
Offline
Last seen: 29 min 12 sec ago
Joined: 09/27/2013 - 02:06
Posts: 91
Location: Queensland, Australia

rizky_p wrote:
kind of disappointing though, i wish that they use standard individual 18650s and battery carrier instead.
hIKARInoob wrote:
rizky_p wrote:
i didnt know it came with battery pack? i thought it is using 8×18650.

There should be 8 × 30Qs in there. It’s 4S2P charging, so they probably don’t want people to stick their entire collection of 18650 cells collected throughout the years in this light.

Yup, me too. Even imalent on Facebook didn’t know when they told me they thought they were individual cells. I Think it would be quite easy to make your own pack with 8× 18650s, soldering and tape.

Astrolux A01, Olight H1R, BLF A6, Olight H2R NW, Original Skyray King, Skyray King 4x XML, BTU Shocker, Manker Mk34 Nichia, Trustfire X100, BLF Q8, Olight X7 NW, Acebeam X45 NW, Imalent DX80

freeme
freeme's picture
Offline
Last seen: 35 min 35 sec ago
Joined: 11/14/2013 - 22:00
Posts: 4855
Location: freedailydeals.org

DX80 suffered from battery charging issue too.

atbglenn
atbglenn's picture
Offline
Last seen: 18 min 35 sec ago
Joined: 07/29/2011 - 12:04
Posts: 4531
Location: Long Island, New York

Is anyone really surprised with quality issues from Imalent?

thegameisrigged
Offline
Last seen: 1 month 2 weeks ago
Joined: 02/05/2017 - 14:08
Posts: 48
Location: Raleigh NC

I was 100% sure I was going to try this light out but now that I know there’s a battery pack with in-light charging I doubt I’ll get one. I do not ever, under any circumstance charge multiple cells in a light. I just don’t trust the terrible charging systems that lights have. This is such a shame because I really had my hopes up. I passed on the DT70 based solely on bad reviews but I was going to overlook bad reviews with this one but the battery pack is a complete deal breaker for me. I mean, come on! Really? When the batteries are dead I do not want to wait to charge it up instead of just swapping out new ones. In-light charging takes like 4x longer and in 1 to 2 years when I want to get rid of the batteries for new ones, I can’t. I’m so infuriated about this. I want to say a lot of choice things about Imalent and the false information they give about their lights but I’m going to hold my tongue. I’ve given up on IMALENT completely at this point.

dchomak
Offline
Last seen: 2 hours 59 min ago
Joined: 03/17/2012 - 20:10
Posts: 3828
Location: Connecticut

I believe there is no battery carrier with individual cells because it would be next to impossible to get one to work properly with the high current demands. Add up all the contact resistances with 8 cells (16), each pushing close to 10A, and well, see what I mean?

This is the same reason Lithium powered hand tools have pre constructed packs. If there is proper charging circuitry, it can be done safely. Whether Imalent has done so is another matter.

When I saw that battery pack in the photo I was surprised. Not because there was one, but rather because I didn’t think ahead of time that there must be one.

Pchri12
Offline
Last seen: 29 min 12 sec ago
Joined: 09/27/2013 - 02:06
Posts: 91
Location: Queensland, Australia

I too had the same reaction when I saw it, but it completely makes sense. This is no ordinary flashlight. We are talking over 300 Watts. That is a huge amount of power. Poor contact between cells and Springs etc make the battery pack look much more suitable in this application. Also, this applied charger says it charges the batteries in under 4 hours. That is quicker than my xtar vc4 can charge 4 cells, let alone 8.

Astrolux A01, Olight H1R, BLF A6, Olight H2R NW, Original Skyray King, Skyray King 4x XML, BTU Shocker, Manker Mk34 Nichia, Trustfire X100, BLF Q8, Olight X7 NW, Acebeam X45 NW, Imalent DX80

JasonWW
JasonWW's picture
Online
Last seen: 1 min 32 sec ago
Joined: 10/22/2016 - 11:41
Posts: 2285
Location: Houston Texas

Pchri12 wrote:
Also, this applied charger says it charges the batteries in under 4 hours. That is quicker than my xtar vc4 can charge 4 cells, let alone 8.

That’s only 0.5 amp per cell on the VC4.

I’m guessing the DX80 charges each cell at 1 amp or so. The battery pack is 4S2P, right? So the charger must put out about 2 amps at 16.8 volts. That’s not too bad.

My Convoy L6 thread with XHP70.2, Texas Avenger FET driver, Narsil v1.2 ramping firmware, lighted side switch and cut down SMO reflector. Lots of amp draws on stock driver as well.
http://budgetlightforum.com/node/54477

My Supfire L5-S thread with XHP70, Texas Avenger FET driver, NarsilM ramping firmware and lighted side switch. My mini L6! http://budgetlightforum.com/node/55746

6 NarsilM user videos https://www.youtube.com/user/JasonWW2000

thegameisrigged
Offline
Last seen: 1 month 2 weeks ago
Joined: 02/05/2017 - 14:08
Posts: 48
Location: Raleigh NC

Imalent says a lot of things and about 10% of it is truthful. I’ll bet my next paycheck on the fact that it will not charge in 4 hours. 8 – 16 minimal. lol

JasonWW
JasonWW's picture
Online
Last seen: 1 min 32 sec ago
Joined: 10/22/2016 - 11:41
Posts: 2285
Location: Houston Texas

Maybe someone can post the label on the charger. Theres a picture above, but the writing is too fuzzy to read.

My Convoy L6 thread with XHP70.2, Texas Avenger FET driver, Narsil v1.2 ramping firmware, lighted side switch and cut down SMO reflector. Lots of amp draws on stock driver as well.
http://budgetlightforum.com/node/54477

My Supfire L5-S thread with XHP70, Texas Avenger FET driver, NarsilM ramping firmware and lighted side switch. My mini L6! http://budgetlightforum.com/node/55746

6 NarsilM user videos https://www.youtube.com/user/JasonWW2000

Pchri12
Offline
Last seen: 29 min 12 sec ago
Joined: 09/27/2013 - 02:06
Posts: 91
Location: Queensland, Australia
thegameisrigged wrote:
Imalent says a lot of things and about 10% of it is truthful. I’ll bet my next paycheck on the fact that it will not charge in 4 hours. 8 – 16 minimal. lol

The charger is 19v at 2A. Not a usb connection. Do your research bro.

Astrolux A01, Olight H1R, BLF A6, Olight H2R NW, Original Skyray King, Skyray King 4x XML, BTU Shocker, Manker Mk34 Nichia, Trustfire X100, BLF Q8, Olight X7 NW, Acebeam X45 NW, Imalent DX80

JasonWW
JasonWW's picture
Online
Last seen: 1 min 32 sec ago
Joined: 10/22/2016 - 11:41
Posts: 2285
Location: Houston Texas

Pchri12 wrote:

The charger is 19v at 2A. Not a usb connection. Do your research bro.

Hey, I was right. I forgot that during the cc phase of charging the voltage goes beyond the cells max voltage in order to push that current.

The VC4 input power is 2 amps at 5 volts which is 10 watts total and the DX80 charger is 2 amps at 19 volts is 38 watts. So yeah, that’s a big difference.

My Convoy L6 thread with XHP70.2, Texas Avenger FET driver, Narsil v1.2 ramping firmware, lighted side switch and cut down SMO reflector. Lots of amp draws on stock driver as well.
http://budgetlightforum.com/node/54477

My Supfire L5-S thread with XHP70, Texas Avenger FET driver, NarsilM ramping firmware and lighted side switch. My mini L6! http://budgetlightforum.com/node/55746

6 NarsilM user videos https://www.youtube.com/user/JasonWW2000

rizky_p
rizky_p's picture
Offline
Last seen: 14 hours 9 min ago
Joined: 03/01/2011 - 05:06
Posts: 761
Location: Indonesia

Maybe we need to build our own DX80 monster BLF style!

Theodore41
Offline
Last seen: 1 hour 30 min ago
Joined: 02/20/2016 - 12:57
Posts: 607
Location: Athens Greece.

rizky_p wrote:
Maybe we need to build our own DX80 monster BLF style!

With a GT as host,a BLF X65 style…
hIKARInoob
hIKARInoob's picture
Offline
Last seen: 6 hours 38 min ago
Joined: 08/28/2016 - 08:15
Posts: 2176

I’m following the forum here http://www.tieba.com/f?kw=%CA%D6%B5%E7 using google translate, and so far it seems that even more people are having issues with this light than with the previous DT/DN series light.
One additional problem is that you’re forced to use the internal charger which doesn’t seem to work properly either.

Pchri12
Offline
Last seen: 29 min 12 sec ago
Joined: 09/27/2013 - 02:06
Posts: 91
Location: Queensland, Australia

Yea I see they are having a few problems. Maybe this is the delay for shipping them. Bad batch. Hopefully we get trouble free lights. They have 5 year warranty anyway and banggood is great.

Astrolux A01, Olight H1R, BLF A6, Olight H2R NW, Original Skyray King, Skyray King 4x XML, BTU Shocker, Manker Mk34 Nichia, Trustfire X100, BLF Q8, Olight X7 NW, Acebeam X45 NW, Imalent DX80

atbglenn
atbglenn's picture
Offline
Last seen: 18 min 35 sec ago
Joined: 07/29/2011 - 12:04
Posts: 4531
Location: Long Island, New York
Pchri12 wrote:
Yea I see they are having a few problems. Maybe this is the delay for shipping them. Bad batch. Hopefully we get trouble free lights. They have 5 year warranty anyway and banggood is great.

What good is a 5 year warranty when you have to send it back to China for service?

WalkIntoTheLight
Offline
Last seen: 4 days 17 hours ago
Joined: 12/05/2015 - 10:26
Posts: 900
Location: Canada
atbglenn wrote:
What good is a 5 year warranty when you have to send it back to China for service?

Depends on the cost of the product, but yeah, very little. Same goes for any international country (including the US for me), which basically means anything I buy on-line may as well come with no warranty at all.

I figure I’m funding my own warranty program. If I bought stuff domestically (even if I could find it), it would cost about 2x as much as ordering on-line. The occasional dud is annoying, but it’s still worth it overall.

hIKARInoob
hIKARInoob's picture
Offline
Last seen: 6 hours 38 min ago
Joined: 08/28/2016 - 08:15
Posts: 2176
WalkIntoTheLight wrote:
atbglenn wrote:
What good is a 5 year warranty when you have to send it back to China for service?

I figure I’m funding my own warranty program. If I bought stuff domestically (even if I could find it), it would cost about 2x as much as ordering on-line. The occasional dud is annoying, but it’s still worth it overall.

That’s my point of view as well. However, this is not applicable in the current situation in my opinion. If you receive a DX80 with issues, it is not that you have received a lemon; it is because the original product is (most likely) of poor quality. Sending it back to China is not going to make the product of a better quality. This means that if you get it back eventually, it still is very likely that you will have more issues in the near future. So how many times do you want to send it back before realising it’s not going to get any better?

Pages