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

I think I used these from eBay:
http://www.ebay.com/itm/5x-0-22-ohm-0R22-0-22R-2W-2-Watt-Metal-Film-Resistor-/170681721498?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item27bd6c629a

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…

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.

Thx gords.

PM sent…and a big Thank You CheapThrills.

I received it :bigsmile:

2,6A on max.

Received from where?

-Garry

Fasttech

150m night shoot


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 :p

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.

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?

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

Click on Delete. :)

thanks for the tip up, deleted :slight_smile:
always forget that this forum has a delete button not like the others :smiley:

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.

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?

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.

I notice that even button top battery placed side by side will have outer diameter more than 24 mm (larger than circle ring on the contact board). Reading from Betweenrides posts, he said his are overlapping the circle ring but nothing bad is happening.

So is it consistent for T08 that all users here have?

I’m asking because I just ordered this light and dumb enough to measure my battery just now (TF flame and panasonic button top), all are measured more than 24 mm (so must overlap the circle ring).

thanks :slight_smile:

The T08's I've worked with (3) all work ok with various sorts of batteries that I've tested - only bad if they overlap the outer ground ring...