Manker U11 owners ?

9 posts / 0 new
Last post
varbos
Offline
Last seen: 1 hour 14 min ago
Joined: 02/16/2017 - 07:36
Posts: 441
Location: Europe
Manker U11 owners ?

I bought a Manker U11 in the recent clearance sale. I am trying to understand if the in-built charging is working correctly or if I have a defective unit.

When I use the built-in charging, the blue light pulsates slowly at the very beginning. But it changes to a solid blue light quite early in the charge cycle (at least as early as 3.5V) and remains solid thereafter. There is no indication when charging is complete – the light stays solid blue.

I believe it is terminating correctly at 4.2V and my USB meter shows no current, but the light stays constant blue.

Does this sound correct ? If there is no indication when charging is complete, this is about as useful as a chocolate teapot.

wle
wle's picture
Offline
Last seen: 4 hours 45 min ago
Joined: 01/07/2015 - 13:49
Posts: 1566
Location: atlanta ga

pretty sure if it is ‘breathing’ [pulsing slowly], it is charging
when solid it is done

you said it terminates at 3.5V, but also “ it is terminating correctly at 4.2V”
those don’t agree

not to be bearing bad news, but the switch on those things is terrible
i am still mad at manker for that

it does work but may fall apart and be unrepairable, quite early

wle

"You never have the wind with you - it's either against you, or you're having a good day."
    Daniel Behrman, "The Man Who Loved Bicycles".
It never gets easy, you just go faster.   
-Greg Lemond.
       ,ø¤º°`°º¤ø¸,ø¤º°`°º¤ø¸,ø¤º°`°º¤ø¸

Paul321
Paul321's picture
Offline
Last seen: 3 days 58 min ago
Joined: 03/07/2015 - 09:44
Posts: 688
Location: Hawleyville, USA

My U11 started behaving bad after 16 months, I didn’t contact Manker, I figure I am SOL. With mine the LED pulses (not the switch) at low levels, gets bright for a short duration than just quits working I reload a different cell and get the same results. I’ve tried the “engineering” mode routine with no results . This light soured me on Manker, I don’t think I’ll buy another Manker.
That’s been my experience.

Paul-

varbos
Offline
Last seen: 1 hour 14 min ago
Joined: 02/16/2017 - 07:36
Posts: 441
Location: Europe

wle wrote:
pretty sure if it is ‘breathing’ [pulsing slowly], it is charging
when solid it is done

you said it terminates at 3.5V, but also “ it is terminating correctly at 4.2V”
those don’t agree


Perhaps I did not explain clearly.

-At the beginning of the charge cycle (with depleted cell) the blue light ‘breathes’.
-However very quickly – like 20 minutes – it becomes solid blue. Much too quick for charging to be complete
-The charging continues (I can see current via my USB meter). Light still solid blue
-Eventually the charging stops (I can see the current stops via my USB meter). Light still solid blue

When I check cell, it is okay, 4.2V

So my issue is that the status light does not tell me when charging is finished. I assume this is a defect but I do not know for sure. Most flashlights with charging will tell you when it is finished – by turning light off, or changing color or something. With this I just have to guess… or use a USB meter which kinda defeats the convenience.

wle
wle's picture
Offline
Last seen: 4 hours 45 min ago
Joined: 01/07/2015 - 13:49
Posts: 1566
Location: atlanta ga

yeah i don;t know, i usually did not use internal charging
when i did i would just do it overnight and assume it was done Smile

wle

"You never have the wind with you - it's either against you, or you're having a good day."
    Daniel Behrman, "The Man Who Loved Bicycles".
It never gets easy, you just go faster.   
-Greg Lemond.
       ,ø¤º°`°º¤ø¸,ø¤º°`°º¤ø¸,ø¤º°`°º¤ø¸

varbos
Offline
Last seen: 1 hour 14 min ago
Joined: 02/16/2017 - 07:36
Posts: 441
Location: Europe

Yeah, it is not the end of the world, I can just estimate when it is done. But it just seems weird (and dumb) that it would not do something – eg turn the lighted switch off – to indicate that charging is complete. That’s why I was wondering if I have a defect.

Regarding the unreliable switch – supposedly this is an ‘upgrade’ version with different switch, different driver, different UI. Time will tell.

Quote:
1. It is upgraded version. Manker upgraded driver, UI, switch…
wle
wle's picture
Offline
Last seen: 4 hours 45 min ago
Joined: 01/07/2015 - 13:49
Posts: 1566
Location: atlanta ga

the manual only says that it goes solid when charging is done

yours seems to be doing something different

is the battery normal? newish, average capacity (2-3000 mah)?

maybe some assumption the charger is making, is different in your case

i have had ultra cheap fire batteries with very little real capacity and they will totally confuse a smart charger

or it just doesn;t work right

wle

"You never have the wind with you - it's either against you, or you're having a good day."
    Daniel Behrman, "The Man Who Loved Bicycles".
It never gets easy, you just go faster.   
-Greg Lemond.
       ,ø¤º°`°º¤ø¸,ø¤º°`°º¤ø¸,ø¤º°`°º¤ø¸

TexasToasted
TexasToasted's picture
Offline
Last seen: 5 hours 58 min ago
Joined: 10/25/2012 - 08:48
Posts: 1080
Location: Texas Gulf Coast

I just received my U11 from the recent clearance sale. It is a bit flakey. Out of the box, with a fully charged battery, the light would turn on in totally random levels. Every time I clicked the switch to turn on the light, I got a different level. Clicking while the light is on might go to the next higher level, or the next lower level. Totally random.
I can get into engineering mode but the first 12 clicks have no effect; the LED makes no light until click #13, and it comes on much brighter than moonlight. Doing a long press to save the setting doesn’t work. It still comes on at random levels.
I finally got it to lock in the moonlight starting level by going into engineering mode, clicking 12 times (still no light from the LED), long press to exit engineering mode, unscrew the tailcap for a few seconds, then tighten the tailcap. Now it comes on in moonlight.
Manker makes good looking lights, but I’m not at all impressed with their quality.

varbos
Offline
Last seen: 1 hour 14 min ago
Joined: 02/16/2017 - 07:36
Posts: 441
Location: Europe

TexasToasted wrote:

I can get into engineering mode but the first 12 clicks have no effect; the LED makes no light until click #13, and it comes on much brighter than moonlight.

For me is the same; albeit the LED comes on at sub-level 7 or 8.

I think this is not really a fault; just the nature of driving an LED at low current. At an extreme low current some LEDs will light and some will not. We can see it also in quads with extreme low moonlight.

However I agree on the other points, the UI just seems to be flakey.

——————

I investigated the charging status light ‘issue’ more. While charging mine does the ‘breathing’ (slowly pulsing blue light) until 3.7V. Then the light becomes solid blue. The charging continues.

The charging terminates at 4.2V but the light remains solid blue as before. Thus there is no visible indication that charging has finished.

I would be interested to know if yours behaves the same.

—————-

Another issue: with a cell below 3.6V, the blinky modes do not work; the main LED simply does not illuminate. Probably because these modes are derived from Turbo. You better hope you never actually need to use beacon or SOS in an emergency!

However despite not working, these blinkies are still present in the sequence so to reach the Battery Indicator you have click past 4 ‘empty’ or non-functioning modes.

It works like this:
Double-click -> Turbo (non-functioning)
Click -> Strobe (non-functioning)
Click -> SOS (non-functioning)
Click -> Beacon (non-functioning)
Click -> Battery indicator

This is ridiculous. Who designed the UI on this piece of crap?!