Test/review of Shockli IMR26650 5500mAh (Black) 2017

The shockli maintains a higher voltage at a given point in the discharge, but that doesn’t mean its IR is lower. The IR determines how much the battery will drop its voltage (the resting voltage minus the voltage under load) at a given current. At a given point in the discharge curve the shockli will have a higher resting voltage than the LK because its capacity is larger, so even if the shockli drops a bit more voltage than the LK the voltage under load will still be higher than the LK because the shockli started at a higher resting voltage.

Essentially the vertical spacing between the discharge curves at different currents is proportional to the IR. In this case the shockli and LK cells have very similar IRs so the shockli’s extra capacity gives it the advantage in pretty much all applications. Comparing the Sanyo 20700A and B cells is more illustrative. At the 5A rate the higher capacity B cell maintains a higher voltage for most of the discharge, but at the 20A rate the lower IR A cell pulls away and is the more suitable cell.

I got 13 seconds at 60A continuous current from one of these: Torchy the Battery Boy: 26650 IMR Batteries

What is the purpose of such 60A test? That is discharging the cell in a quite stressful trial, about equivalent to start discharging the cell with a load of about twice the cell's internal resistance for most of those, with quick load resistance tapering off.

The only cells I know which could overcome such test with quite a success would be the A123 ANR26650M1-A/B LiFePO4 units. Mooch tested the “B” one and got most of the cell's capacity at 60A down to “just” 2.5V (A123 ANR26650M1-B 2400mAh 3.3V 26650 Bench Test Results...an extraordinary battery, with issues @ Mooch at E-CigaretteForum):

He doesn't uses 4 terminal holders for accurate voltage monitoring, so some current proportional drop should be substracted from added to the curves, at least this is what he told me on another cell review discussion.

Originally posted on Fri, 05/05/2017 - 02:34; lil fixup.

OMG you can start a small car engine with 4 of that cells. :open_mouth:

I have so many batteries that have “60A” printed on the wrapper, I was curious as to how batteries would actually perform at 60A. This one charged up ok after discharging at 60A, so I suspect it has a temperature interupt device rather than a current interrupt device.
I wouldn’t go by the results from a West Mountain Radio CBA. I have three of them, but only use them for continuous current testing on NiMh batteries and ICR Li-Ion batteries up to 5A. The slew rate is far too slow for high current testing.

The ANR26650M1-B was reviewed by HKJ long ago, with his old non 4-terminal setup.

With regards to the aforementioned testing divergence:

From HKJ's review of Samsung INR21700-30T.

Mooch's graph.

There's a little voltage difference among those curves, likely caused by the associated current travel path resistance to Mooch's voltage monitoring probes. Addressed by me in his review of it.

With regards to the actual limitations of the West Mountain Radio CBA, I have no idea besides knowing Mooch's setup is highly customized and improved.

Oh! By the way, 3.2V as high discharge cutoff? This is something I've somewhat got used to hearing from the E-CigaretteForum (LoL!). In my opinion, it is a very high and inadequate value, though of course I can understand its purpose.

There's no doubt their perspective/approach in all of this battery management stuff is quite different from mine. I always (or nearly) keep my li-ions at a max voltage of 14/15 charge voltage to maximize cell lifespan. Knowing how stressful is discharging a cell at around its effective limits/ratings, my philosophy tells me it is wiser to discharge at a slightly slimmer ratio (divide max by √2 as P = I²R) in order to substantially reduce thermal stress in continuous discharge. For pulse discharging, I'd limit myself to about the continuous rating or very little more.

P.S.: yes, the ANR26650M1-B is a real high discharge champion. Good offers for it in AliExpress.

good battery
to quick charge

Any retailer shipping to EU?

Hi Agro

would you can contact our UK reseller Torchy ,he stock the 5500mah battery .his website is http://www.torchythebatteryboy.com .

i do not know if he can ship the battery to you .

Mailed them, thanks.

Unfortunately, Torchy can’t sell batteries internationally.

At all, or just via eBay?

Send him a Bitcoin donation, pretty sure you'd end up receiving a cells' grab bag.

LoL!

I mailed him and got a quick reply:

Hey guys, i like shockli brand, new windy fire product line, i have windy fire 18350 series light and it works great on the quad xpl hi v3. i dont know if it the battery or driver… the light doesnt step down from the 2 minutes on high.

So what?? How soon can we order the new shockli 5500 Mah?? If it take very long, i will just get the shockli 4200 mah for $8.49 each,…

I would like to find these in the US… anyone know where… google did not nail them down for me.

Email Simon @ Shockli directly, to order the 26650 5500mah.

I ordered 4, shipped on Apr 27, received them May 10 to Texas.(13 days)

Ordered them direct from Shockli / Windyfire.

Hi Newlumen

Good weekend. Thanks good feedback for shockli battery .

http://www.mtnelectronics.com have stock some shockli 26650 5500mah ,would you can contact him to check .

now the /www.mtnelectronics.com have some promotion for shockli 26650 battery ,if buy shockli 26650 battery you can get a zipper case .you can see the picture .

They do not show on Richard’s site… just checked again. Have been looking for it and the new Aspire daily!

Same… I know mtnelectronics.com. I ordered lots of unprotected 18650 from there before. They do not have 5000 or 5500 mah shockli 26650… I will keep checking this page for an update… thanks.

The Shockli zippered hard case is handy for more than just battery storage. (Note: Won’t hold both images at the same time)
Top picture= 2 @ 26650 cells
Bottom picture= Lumintop Prince Mini + Copper Tool + Windyfire 14500 battery