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Mine Exploration Forum

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Author Imolent warranty - no go
robnorthwales

Joined: 21/05/2008
Location: Denbighshire, North wales

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Imolent warranty - no go
Posted: 25/08/2020 17:11:15
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legendrider wrote:

sounds like you've had your £30-worth of fun with it then!!

Look forward to seeing the reverse-engineered retina-roaster!

MARK


Funnily enough, the phrase 'bat-cooker' had just crossed my mind
IP: 51.9.104.32
royfellows

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Joined: 13/06/2007
Location: Great Wyrley near Walsall

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Imolent warranty - no go
Posted: 25/08/2020 19:19:30
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Doubtful. I keep trying to get the PCB out to analyse the schematic. But not hopeful. If I do a lot of Chinese electronics have chips with no part number, so impossible to identify.
Probably rip offs of legit production runs for major western companies.

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'' as rare as a Cwmystwyth padlock''
IP: 88.108.26.239
royfellows

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Imolent warranty - no go
Posted: 26/08/2020 13:31:22
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Got the PCB out. There is a large chip doing the charging and indication bit and a Texas Instruments PMP 4057 LED boost driver, but nothing resembling anything like an inverter, or any series inductor, everything just being done by MOSFETs.
I did test it before I did this and got 2.91 amps out on turbo - fresh charge battery. At nominal voltage it was down to about 1.6 amps giving about 600 lumens, in other words, it nosedives.

Its scrap now anyway as I broke the flat ribbon data cable to the charge state indicator getting it out.

Frankly, I cannot see a point to this torch. It was just about light and small enough to put on a keyring but had to work a bit of copper wire through the little hole they provide and solder the ends into a tiny circle to get it on a keyring.
There are powerful pocket torches out there that take a single removable to charge - 18650 cell and have proper boost electronics to drive an XHP 35. Imolent do one.

Any, bought this for the princely sum of £14.35
Olight I1R 2 EOS 150 Lumens Key Ring Mini Torch EDC USB Rechargeable Flashlight

Let you know how it works out. Keyring torch is useful as you will always have your keys on you

--

'' as rare as a Cwmystwyth padlock''
IP: 88.108.26.239
legendrider

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Joined: 13/07/2014
Location: Darlington

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Imolent warranty - no go
Posted: 26/08/2020 18:02:47
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royfellows wrote:

Now got to the bottom of it.
Basically, its scrap. Testing it at nominal voltage, its taking a fluctuating 30mA on standby, which is 'off' being under soft control, from a 850 mAh cell. This tends to explain things. Obviously the capacity of the cell indicates a cell designed to deliver a high discharge.

Obviously it discharged itself down to the point whereby the battery management disconnected the battery, this should typically be 2.7 to 3.0 V according to the design. Obviously there has to be a margin as someone could put it away discharged and it could then fall below the 2.5V discharge limit through standing, after which is should not be chargeable.

Lozz makes very pertinent comment. If a LiIon cell falls below the safe minimum (refer to manufacturers data sheet), recharging can cause internal short circuits. There have been fires.
A properly designed charger should not charge a cell if its voltage is below the safe limit.

As far as this torch goes, my advice is to avoid. The warranty situation is obvious and the reliability of the torch design dubious. Shame as I liked Imolent.



should be re-branded as a pocket-sized Chernobyl!

MARK

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festina lente IP: 81.100.181.10
royfellows

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Imolent warranty - no go
Posted: 26/08/2020 20:13:20
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Yes, just took delivery of a SH refurb Nenovo tablet, dont use a phone, just want GPS and maps.
USB port dead, not charging or recognising inserted flash memory. Lucky this time as its on return period and have not yet left feedback
Devil

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'' as rare as a Cwmystwyth padlock''
IP: 88.108.26.239
royfellows

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Imolent warranty - no go
Posted: 28/08/2020 11:02:12
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royfellows wrote:



Any, bought this for the princely sum of £14.35
Olight I1R 2 EOS 150 Lumens Key Ring Mini Torch EDC USB Rechargeable Flashlight

Let you know how it works out. Keyring torch is useful as you will always have your keys on you


I have just received this and first impressions very favourable.
Its quite tiny, smaller than my little finger and weighs only 11 grams. Its 150 lumens max which is enough to get you out of anywhere, with 2 modes inc a smaller stated 5, and the max. I think the smaller is understated after having just tested it as this would get you out of anywhere.
There is a definite beam pattern in a nice clearly defined circle, don't know what the LED is but this is very clever for such a small size. It does look like a custom optic in there, whatever, it works well. On the max its extremely impressive for such a small piece of kit.
Just the 2 modes, no daftness.

They rate it at IPX8 2 metres. The switch is a twist to operate and required definite effort, so this is a rider against accidental operation. The back unscrews and retracts to expose the mini USB charging port and charging indicator. The ring is about 8mm so easy to fit on a keyring.

On the face of it, I see a real winner.

We all go underground on our own sometimes, now don't we, and we all carry spare lighting as well dont we. But.....

An independent impartial review here
https://1lumen.com/other-reviews/olight-i1r-2-eos/

--

'' as rare as a Cwmystwyth padlock''
IP: 88.108.26.239 Edited: 28/08/2020 11:04:38 by royfellows
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