REVIEW: Olight I3S-CU . First Impression (Pics and runtime)

19 posts / 0 new
Last post
Trevi_lux
Trevi_lux's picture
Offline
Last seen: 17 min 34 sec ago
Joined: 09/04/2012 - 10:52
Posts: 1753
Location: Spain
REVIEW: Olight I3S-CU . First Impression (Pics and runtime)

Received one week ago this little brass light: Olight I3S-CU Polished finish:

 

 

Olight I3S-CU Polished finish: (made of brass)
LED: XP-L Cool white
REFLECTOR: Orange peel
BATTERY: 1xAAA 0.9-2.0 V (NiMH, Alkaline, primay lithium).
MODES: 3 HIGH/MID/LOW
INTERFACE: Twisty
DATE: February 2016

FROM: Olight I3S-CU hkequipment.net


Packaging, perfect for carrying the flashlight, to give away or to store the flashlight. Includes one alkaline battery ( I am not a big fan and, I will use with high quality NiMH aaa) and a Manual user, but I miss one spare oring.

 

 

 

 

The light not change the size of his predecessor I3s aluminium version, but the weigh is increased for the new material:

 

 

Some Pics now for comparisson with other "3 Series"; ITP A3 Eos upgraded (XP-G R5), Olight I3 (XP-G R5) and Olight I3S (XPG-2):

 

 

 

Now Pic with a Maratac aaa copper Rev3, my first copper flashlight, I am not sure yet if I will be a fan of copper lights....(but I love this Maratac!)

 

 

and with other well known aaa flashlights:

 

 

Some pics for detail of design; tailstand is allowed, the threads have a good quality and run very soft. The clip is strong enough for this little size. head to head with the auminium version, only 2 small external aesthetic differences:

 

 

 

 

 

Battery and Interface:

Information from Olight says; 0.9-2.0V, and of course I will no try 10440 on this. I prefer NimH and Primary Lithium.

 

 

Is a Twisty light (tighten and loosen head for changing modes).

No memory modes, always turn on the highest mode. The sequence; High,Mid,Low,High,..... (this I3s-CU has not hidden strobe as the I3S aluminium version)

LED/BEAM:


A XP-L Cool white welll centered in small Orange Peel reflector. Perfect beam, more flood than his colleague in aluminium:

 

 

 

 

 

A animated gif:

 

Information about modes and runtime in high:

Official information manual:

 

 

First I put a small graph of relative power modes in % to get an idea of which is the distribution of modes. Considering that the flashlight has 3 modes, but how high suffers a drop in power "step down" programmed for 3 minutes, I have included the value of this step as a reference within the graph;

(ceilling bounce)

 

 

Runtime test in High mode with a Panasonic Eneloop NiMH min. 750 mA. One data for minute, for reference the 100% on this test is the highest value between 30 and 180 seconds (ANSI NEMA FL-1 standard).

 

 

In detail the first 4 minutes of test, one data for each 10 seconds. The step down begins at 3 minutes, slowly descent for 30 seconds to about 45% of initial power and then the line is flat:

 

 

I love the light, my score is 9/10. (for the price is a perfect 1xaaa, but I will prefer a diferent order of modes, my preferred for aaa lights is low/mid/high).
This sample was not provided for review.

 

PLEASE COMPLETE REVIEW IS (IN SPANISH) HERE, http://luxlinternas.blogspot.com.es/2016/02/olight-i3s-cu-polished-finish-1xaaa-xp-l.html

Edited by: Trevi_lux on 03/02/2016 - 02:08
djozz
djozz's picture
Offline
Last seen: 6 hours 52 min ago
Joined: 09/07/2012 - 17:04
Posts: 10846
Location: Amsterdam

Thanks for another immaculate review, always a treat to read Smile

bobofire
bobofire's picture
Offline
Last seen: 2 days 19 hours ago
Joined: 02/25/2015 - 09:38
Posts: 109
Location: USA

Well done review. Looking into one of these so the timing was perfect. Thanks

Fritz t. Cat
Fritz t. Cat's picture
Offline
Last seen: 1 day 3 hours ago
Joined: 05/07/2013 - 00:33
Posts: 2535
Location: Si Valley

Nice review. Great pictures! Nice square threads.
I wish I had one, but in a way it is like gold plating a Ford car to polish something with such a simple conventional shape. I like the looks of Maratac best of those pictured, but even that is a shameful waste of the potential of a numerically controlled lathe.
The step down at 3 minutes demonstrates the regulation and might be useful, especially with lithium primaries. Alkalines ramp down all by themselves. Their voltage droops when current is drawn and recovers when they rest. So a circuit that droops with its input voltage might be just as useful as this deliberate regulation.

Flashlight designers should look at lighthouses and pottery.
这些谁设计的手电筒应该看灯塔,以及在陶器。

Trevi_lux
Trevi_lux's picture
Offline
Last seen: 17 min 34 sec ago
Joined: 09/04/2012 - 10:52
Posts: 1753
Location: Spain

Thanks guys for comment.
I have bought the raw version, (not polished), perhaps is a preferable finish for some people, when it arrives I will include some Pics here for comparison.

Leif
Offline
Last seen: 4 weeks 1 day ago
Joined: 08/03/2015 - 13:52
Posts: 373
Location: East Hampshire, UK

Good review.

The Miller
The Miller's picture
Online
Last seen: 1 min 18 sec ago
Joined: 12/14/2015 - 12:08
Posts: 9731
Location: Charente France

nice review!

Brass is so much harder then copper and aluminium, one wonders why there are not more flashlights being made from it.

Love the looks of your Maratac!

Trevi_lux
Trevi_lux's picture
Offline
Last seen: 17 min 34 sec ago
Joined: 09/04/2012 - 10:52
Posts: 1753
Location: Spain

Hi!!!

- I have tested again, after step down, I wait a few seconds, and cycle again to high mode. The light maintain again for 3 minutes the high mode, with a power over 90% of initial

arow55
Online
Last seen: 5 min ago
Joined: 04/24/2015 - 00:02
Posts: 162

Do copper or brass have any advantage transferring heat compared to aluminum? How would the three rank from best to worst?

Trevi_lux
Trevi_lux's picture
Offline
Last seen: 17 min 34 sec ago
Joined: 09/04/2012 - 10:52
Posts: 1753
Location: Spain
arow55 wrote:
Do copper or brass have any advantage transferring heat compared to aluminum? How would the three rank from best to worst?

I think the better transmission of heat is copper and the worst is SS, I am not sure what is the best between aluminium or brass, but really, for this aaa with NiMH, in the real use, I not perceive difference.

Trevi_lux
Trevi_lux's picture
Offline
Last seen: 17 min 34 sec ago
Joined: 09/04/2012 - 10:52
Posts: 1753
Location: Spain

Yesterday receive the unit in fisnish not polished: “raw version”, I like both….
bought here in http://www.ebay.com/itm/OLIGHT-i3S-cu-CREE-XP-L-HD-LED-180lm-AAA-BRASS-FLASHLIGHT-/391377307507 hkequipment

Some Pics for comparisson:

arow55
Online
Last seen: 5 min ago
Joined: 04/24/2015 - 00:02
Posts: 162

The manual says copper but you described it as brass.

Minimoke
Offline
Last seen: 2 weeks 3 days ago
Joined: 06/14/2012 - 20:48
Posts: 99

nice collection.

dw911
Offline
Last seen: 7 hours 23 min ago
Joined: 06/27/2014 - 07:44
Posts: 548
Location: UK
arow55 wrote:
The manual says copper but you described it as brass.

It is brass, we take cu to be copper as that’s it’s chemical symbol, but the Chinese seem to use cu to describe brass – they did the same with the silver i3s and described it as cu, but it was brass too – so blame the Chinese lol

Great review Smile

Trevi_lux
Trevi_lux's picture
Offline
Last seen: 17 min 34 sec ago
Joined: 09/04/2012 - 10:52
Posts: 1753
Location: Spain
dw911 wrote:
arow55 wrote:
The manual says copper but you described it as brass.

It is brass, we take cu to be copper as that’s it’s chemical symbol, but the Chinese seem to use cu to describe brass – they did the same with the silver i3s and described it as cu, but it was brass too – so blame the Chinese lol

Great review Smile

Yes, both are brass. I sorry for use the chemical symbol Cu….but is the name of this light,.. Innocent

arow55
Online
Last seen: 5 min ago
Joined: 04/24/2015 - 00:02
Posts: 162

The manual page you showed described it as copper with gold plating.

Trevi_lux
Trevi_lux's picture
Offline
Last seen: 17 min 34 sec ago
Joined: 09/04/2012 - 10:52
Posts: 1753
Location: Spain

In china perhaps they use the word copper for describe sometimes the brass alloy.
I have read some descriptions of this in his web: “bronze body processed by PVD coating with titanium-gold coloration.” or “ It is made of high heat conductivity and low electrical resistivity brass alloy”…

But is brass, in his web says brass, in my review says brass in the first sentence… I think is clearly that it is made of brass….

Fritz t. Cat
Fritz t. Cat's picture
Offline
Last seen: 1 day 3 hours ago
Joined: 05/07/2013 - 00:33
Posts: 2535
Location: Si Valley

The advantage brass, aside from appearance, is that it is easy to work with. A German told me it was invented for no other purpose than to be easy to machine, and it is the standard by which machining ease is measured. So there is a level of complexity and and precision at which brass becomes cheaper to make than aluminum, in spite of the cost of the copper content. It also can be soldered.
Copper conducts heat and electricity better than aluminum, by volume, but I think brass not as well. Those are conduct much better than steel or titanium.

Flashlight designers should look at lighthouses and pottery.
这些谁设计的手电筒应该看灯塔,以及在陶器。

carbone
carbone's picture
Offline
Last seen: 4 days 22 hours ago
Joined: 10/04/2017 - 21:51
Posts: 21
Location: California

Anyone try a lead test kit on the raw brass one to see whether any lead is detectable in the alloy? I don’t know if a negative result would be conclusive but it would be good to know if there is a positive result.