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

Got it! Thanks Garry

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

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 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…

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?