Well we dont know how will they perform on a long temr base
My personal ones i charged like 10 times so far, they work great
Cold weather could be an issue, Liions dont like temps below 10deg c
Last winter i went hunting one morning, the temps here could be quite moderate cold ones, that partucular morning they were like - 20 and i lost 4 Samsung 25rs
lost 4 25r?
i have a versapak kit in my trunk that went to 0f and the packs did fine in the drill driving a ton of drywall screws after an overnight cold soak.
never seen low temps kill cells only cut their performance till they warmed up.
these are green 25r and lg he4.
both did equally well.
using them at a high rate warms them a bit.
Mine came today.after careful calibration of the dick smith esr and a test that gave 20 mohms this is the lowest yet.they are getting better.
edit.
after full charge i repeated.
now if i press very hard on the pointy probes i can get to .01 blinking to .02
so 19 or 18 mohms
UDO, you mean you are âabsolutelyâ sure your e-bike limits itself for max 14A amp draw (â700W of power)? I reeally doubt it.
A 14S3P pack of NCR18650Bs, though slightly lighter, would be a baad idea, imho. 3P NCR18650Bs aren't high drain cells and, comparatively, would barely deliver slightly more current at the same output voltage than a single LiitoKala 26650-50A/B.
For a vehicle, no matter what, it is advisable to use sufficiently high drain/power cell packs. Either that, or its throttle response/slope performance will suck, not to mention battery life would also crumble.
It is also possible to build hybrid battery packs. If, for example, you were to like the idea of having a battery pack combining slightly less weight and capacity but preserve/enhance top power output, you could then assemble, for example, a 14SαP pack, for α = sum of a top notch high drain 18650 plus our 26650.
Cheers ^:)
Originally posted on Fri, 12/30/2016 - 04:10; typo fixup.
absolutely.test equipment is a triton hobby charger.
i still have 2 and will test them over the holiday weekend.
the other 4 from the order are in box mods and doing great.
Are you at all interested in modding my Utorch UT02 (Manker U21)? I would certainly pay for materials. Maybe work a trade of some kind? Maybe a new in package Lumintop TD16? Or something else.
update.
i discovered high resistance in my test rig.banana plugs to my holder were losing their tension.
charged the cells again and started another discharge.holding 4.13v @ 1a at start.
was 3.96v.
so these are likely better than we thought.
stay tunedâŠ
These are a bit wider and a bit shorter then most other 26650âs, it fits like a glove in the L6, it doesnât fall when inserted it just slowly lowers itself to the bottom.
Gonna get some serious amps mangled from them pretty soonâŠ
The BMS low voltage/under discharge protection works well. I accidentally hard-shorted the BP+/B- terminals while assembling the stuff, a lil smoke crept away⊠Had to hook the thing up to the charger board to relive it. Quite interesting to notice my multimeter could actually measure some volts at the output terminals after the âaccidentâ, a below 1Hz voltage signal oscillating between very high 6s and low 7s.