Review: Small Sun ZY-T08 2 x 18650 (Parallel)

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gords1001
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Yes, no problem. As long as their button tops.

BILL G
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I would be Very Carefull with Wide + Button Batteries. If they Span over 26mm they may Short to – GRD.
garrybunk
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I can say my protected KeepPower Panasonic 3100's from KumaBear fit in my ZY-T08 just fine.  I expect yours will be ok too.

-Garry

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wikiman
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It’s my 1-st post on BLF so hello everyone flashoholics Smile
I decided to buy this flashlight for example there: CLICK Anyone has Small Sun ZY-T08 from this site?
I have a lot of cells 18650 but all are unprotected so could someone confirm built in voltage protection? If not, which flashlight will you suggest? My aim:
- throw
- 1 (or 2) unprotected 18650
- budget under $30
I read that Small Sun ZY-T13 and Romisen RC-T602 are also good choice. How about built in voltage protection? Any other suggestion?

koyotee
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hi, welcome to blf!

i just recieved mine from manafont today, but hadn’t time to test it out… anyway fasttech is a popular site among blf members and i highly recommend it, bought 2xncr 18650a there.

i also recieved a xintd c8 v3 with u3 from intl-outdoor, and this one is a “must have” for all the forum members, hope u got enough spare $$$ Big Smile

Finaly, proud owner of a Powerex Maha mh c-9000 for my Eneloops:)

wikiman
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Thanks koyotee for confirm. How long did you wait for order from Manafont?
I read about xintd c8 and c8 clones in generally. I understand that it’s a very good flashlight but as I read it’s a good compromise between flood and throw (so very usefull for EDC). I have good one flood stuff so I need real THROW Big Smile In addition with built in voltage protection…
Any other suggestions?
Can anyone confirm protection in Small Sun ZY-T13 ???

Streamer
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Anybody with this the T08 explain how to measure amps it draws? I can see the five contacts of the switch. Do you just meter between the switch contact and ground?

Asking so I don’t poof the darn thing.

garrybunk
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You won't poof it, there's no positive lead there. You'll either get a good reading or nothing at all (and the light won't light up). You removed the switch cover, right? Put one lead in the screw hole from the removed cover and touch the other lead to one side of the switch (switch contact point). If correct the light will turn on and you'll get a reading. If nothing, try the lead on the other switch contact point. Be sure to report back with current on high, battery voltage, and battery brand and model (mAh). 

-Garry

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gords1001
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I don’t think it has low voltage protection. You can roughly work out a run time from current at tailcap vs cell mah (always use identical cells) x 2.

Streamer
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Got it! Thanks Garry

Got 2.62 amp max. draw on Panasonic CGR18650CG 4.0 volt charge (my own laptop pulls) Capacity @2250ma.

Streamer
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Now of course my next question is will the resistor mod bring it up to 3amp draw?
If so, where to acquire such resistor and what wattage as there seems to be many around at .22 ohm and various wattages?

gords1001
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I ordered the pots viffer linked earlier in the thread, then gain an asditant to hold leads/cells and dial in your current. I’ve not got back to replace the pot I fitted, but this is how I did this previously, just need to fit the new pot and switch, tune it up and I’m away, although the thought has occurred to fit one of the nw xm-l2’s that are inbound…

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Streamer wrote:
Now of course my next question is will the resistor mod bring it up to 3amp draw? If so, where to acquire such resistor and what wattage as there seems to be many around at .22 ohm and various wattages?

I think I used these from eBay:
http://www.ebay.com/itm/5×-0-22-ohm-0R22-0-22R-2W-2-Watt-Metal-Film-Res...

They are not SMD components (I don’t have a clue, where to get SMD 0.22Ohm resistors…).
Because of their size, you will have to bend legs a bit to get a good fit.

PM your address, if you need one and I will send it. Got plenty of them left…

garrybunk
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Streamer wrote:
Got it! Thanks Garry Got 2.62 amp max. draw on Panasonic CGR18650CG 4.0 volt charge (my own laptop pulls) Capacity @2250ma.

2.62A isn't bad, but is that due to cells only being at 4.0v? Any cheap e measuring on freshly charged cells?

-Garry

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Streamer
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garrybunk wrote:

Streamer wrote:
Got it! Thanks Garry Got 2.62 amp max. draw on Panasonic CGR18650CG 4.0 volt charge (my own laptop pulls) Capacity @2250ma.

2.62A isn’t bad, but is that due to cells only being at 4.0v? Any cheap e measuring on freshly charged cells?

-Garry

Nope. Had a pair of same batteries topped off at 4.21V…no change

HOWEVER….there seems to be a “hidden turbo” like you referred to as I hit 2.96amp on several occasions fiddlin around here while jumping modes. Hmmmm….

Oh, and I got this one from FastTech.

wikiman
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gords1001 wrote:
I don’t think it has low voltage protection. You can roughly work out a run time from current at tailcap vs cell mah (always use identical cells) x 2.

Thx gords.

Streamer
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CheapThrills wrote:
Streamer wrote:
Now of course my next question is will the resistor mod bring it up to 3amp draw? If so, where to acquire such resistor and what wattage as there seems to be many around at .22 ohm and various wattages?

I think I used these from eBay:
http://www.ebay.com/itm/5×-0-22-ohm-0R22-0-22R-2W-2-Watt-Metal-Film-Res...

They are not SMD components (I don’t have a clue, where to get SMD 0.22Ohm resistors…).
Because of their size, you will have to bend legs a bit to get a good fit.

PM your address, if you need one and I will send it. Got plenty of them left…

PM sent…and a big Thank You CheapThrills.

nekdo12
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I received it :bigsmile:

2,6A on max.

garrybunk
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nekdo12 wrote:
I received it :bigsmile: 2,6A on max.

Received from where?

-Garry

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nekdo12
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garrybunk wrote:

nekdo12 wrote:
I received it :bigsmile: 2,6A on max.

Received from where?

-Garry

Fasttech

nekdo12
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150m night shoot


sorotantaz
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sorry for the stupid question.

is really parallel config safe from reverse polarity charging like in serial? or is there still probability to be reversed?

anybody test the runtime? seems like everybody has been "wow"ed by the throw and forget everything else Silly

 

 

CheapThrills
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IMO it is safer, I´m not 100% if parallel configuration rules out the reverse charging totally but it is safer.

What I mean, is that I don´t know Exactly how batteries react if 2 pieces of totally different voltage are inserted when using parallel.
I know that in serial configuration this can be dangerous.

Runtime on High depends on what batteries you are considering to use.

sorotantaz
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I keep digging on the but seems can't find a certain answer from the expert or people who really know what they are doing. the most common explanation is the weaker cell will absorb the power from the better cell to maintain voltage level. dunno if that process is a safe case with lithium. maybe runtime on panasonic 3100 mAh?
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sorotantaz wrote:
error, double posting. please help to delete, Admin.

At the bottom of your post are buttons labeled:  Quote, Delete, Edit, Reply, and Mark as SPAM.

Click on Delete.   Smile

sorotantaz
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raccoon city wrote:

sorotantaz wrote:
error, double posting. please help to delete, Admin.

At the bottom of your post are buttons labeled:  Quote, Delete, Edit, Reply, and Mark as SPAM.

Click on Delete.   Smile

thanks for the tip up, deleted Smile always forget that this forum has a delete button not like the others Big Smile
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Anyone try a U3 or XM-l2 in this? I have some of both on the way and am thinking of trying one or the other.

I know it has a giganto star, but if I center it right with a little Fujik, I’m thinking a 21 would work fine with that big plastic white retainer to center it and cover up hot wires.

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sorotantaz wrote:
I keep digging on the but seems can’t find a certain answer from the expert or people who really know what they are doing. the most common explanation is the weaker cell will absorb the power from the better cell to maintain voltage level. dunno if that process is a safe case with lithium.

maybe runtime on panasonic 3100 mAh?

Imagine two water tanks, one full, one empty, connected together with a pipe. Once connected, water will immediately level off until both tanks are at the same level. That’s how it is with voltage when placed in parallel.

Different water tank size = capacity. Water will level out regardless of tank size, so will voltage level out between batteries regardless of the battery capacities. 200gallons tank linked to 400gallons tank will have 600gallons capacity when linked, and both will drain appropriately and self levelling – similar to batteries put in parallel.

The only “bad” thing would be if you put empty battery + full battery in parallel, immediately the full battery will charge the depleted one at high rate it can give – meaning it will hurt the batteries capacity a bit, and it might heat up. Either way, even at worst case, it is not too risky.

sorotantaz
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Pulsar13 wrote:
sorotantaz wrote:
I keep digging on the but seems can't find a certain answer from the expert or people who really know what they are doing. the most common explanation is the weaker cell will absorb the power from the better cell to maintain voltage level. dunno if that process is a safe case with lithium. maybe runtime on panasonic 3100 mAh?
Imagine two water tanks, one full, one empty, connected together with a pipe. Once connected, water will immediately level off until both tanks are at the same level. That's how it is with voltage when placed in parallel. Different water tank size = capacity. Water will level out regardless of tank size, so will voltage level out between batteries regardless of the battery capacities. 200gallons tank linked to 400gallons tank will have 600gallons capacity when linked, and both will drain appropriately and self levelling - similar to batteries put in parallel. The only "bad" thing would be if you put empty battery + full battery in parallel, immediately the full battery will charge the depleted one at high rate it can give - meaning it will hurt the batteries capacity a bit, and it might heat up. Either way, even at worst case, it is not too risky.

intuitive illustration. Now the question is, is it actually technically safe when the full voltage battery try to flow into (aka "charging") the so called empty battery to level the voltage? 

 

 

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Ubehebe wrote:
Anyone try a U3 or XM-l2 in this? I have some of both on the way and am thinking of trying one or the other. I know it has a giganto star, but if I center it right with a little Fujik, I'm thinking a 21 would work fine with that big plastic white retainer to center it and cover up hot wires.

XM-L2 U2 1C/SinkPAD mounted on copper disc, copper heat sink in pill, Nanjg 4.2A, UCL/p lens, copper braid added to tailcap springs:

  1,200 lumens at 30 secs, 210 kcd measured at 4.31 meters. It's a little beast!!

 An amazing instrument for it's size - don't know of anything that compares for its size! An HD2010 should do the same, but on a single battery, it won't hold up as well as this light does. Second one I built that produces these numbers, other one was measured by rdrfronty the same as my measurements, this one slightly better. I've noticed it just doesn't drop off the longer the battery depletes like a single cell Nanjg based XM-L2 would.

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