18650 5000mah vs 26850 5000mah battery

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DayLighter
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while browsing ebay i found these batteries.. the price is hard to resist so i bought 4 of them for $12/free shipping.

lucky for me the seller decided to ship me extra battery no charge in exchange for 5 stars rating Smile
i like them so much i bought 16 more from her.. and she said next order she’ll give me 10 for $20 free shipping
my question is.. which is better? 26850 5000mah or 18650 5000 mah?
beside the obvious 18650 is lighter
:Photobucket

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CouldUseALight
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18650s don't go to 5000 real mAh

Well it’s possible that the 26850s approach 5000 mAh, but no chance the 18650s do.

Batteries, in my brief experience, are likely to be worth what you pay.

DayLighter
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well i’d seen AA rechargeable

well i’d seen AA rechargeable lithium up to 10000mAh, you don’t think 18650 which is bigger than AA battery can reach 5000mAh? Smile

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Rod911
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5000 mAh 18650, I don't think so...

The highest 18650 I have seen are rated for 3400 mAh and the cells are from Panasonic. I don’t think the Chinese have developed the technology to surpass Panasonic just yet…

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Well, I’d rather buy a pair

Well, I’d rather buy a pair of better cells instead of dozen of that crap Stare

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CouldUseALight
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Only on Chinese meters, LOL

Well, anything’s possible in “Chinese mAh” Crown

Similar to Chinese lumens, in which case, 9000(give or take a zero), no problem, ten dolla!! Laughing out loud

3400s seem to be the biggest mAh semi-reliable 18650s, going by this page
(http://www.lygte-info.dk/info/indexBatteriesAndChargers%20UK.html).

BetweenRides
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Daylighter - here's some

Daylighter - here's some light reading for you: http://budgetlightforum.com/node/14962 Laughing

At least you got them cheap! (Glass 1/2 full kinda guy, I am...) Tongue Out

ZW99GT
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You’ll learn why this isn’t

You’ll learn why this isn’t possible and how to spot the good from the bad in no time! Contact Kumabear here to order some quality cells.

ChiggerPepi
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The difference: One

The difference:

One manufacturer is lying more than the other.

DayLighter
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bad batteries?

like someone said.. even the trusted supplier can get bad batch from their own supplier without them knowing
unless kumabear tested every single batteries that he sell.. i’ll just gamble and hoping get lucky Smile

these days there’s no way of knowing if you getting the real trustfire batteries or not
at least the batteries that i got makes no attempt to hide in any brand name skins Cool
maybe i’ll check panasonic batteries..

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attitude
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both those batteries mate u

both those batteries mate u can round the numbers down to 500 MAH more suited to those brands off ebay..

panasonic 3400 or king kong 4000 mah is currently best ones u can get both unprotected though.

people report trustfires 26550 has 4300 mah but i doubt reliability of TRUSTFIRE!! anything that says trust u just dont!

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attitude
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NZ Shooter wrote:attitude

NZ Shooter wrote:
attitude wrote:
i doubt reliability of TRUSTFIRE!! anything that says trust u just dont!

Do you own any Trustfire torches ??
Or is that just in reference to the batteries??

reference to the batteries as 2 many dupes are around i never had a genuine battery even the fake one had hologram sticker so i now stay away from that brand of bat, i own couple of Trustfires j-12 and mini keyring all good in the manufacturing department.

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Daylighter you are free to

Daylighter you are free to buy whatever fake battery you like, but please don't pretend they are real or even less that the capacity numbers are real!

Betweenrides gave you a very interesting link, read it. Most (if not all) discounted cells on sale on ebay are just recycled (used and thrown as garbage) laptop battery packs, dismantled, the cells rewrapped with some new labels an sold to innocent people that only read the label and unknowingly believe they are good quality products.

There's no quality for cheap in today world.

The ONLY way one can have some profit selling 4 cells with free shipping at $12, is that the cells came for free.

Feel free to not believe my words or other savious members here, but ask someone with a serious RC charger to charge and discharge your cells, writing down the actual mAh. You may end looking under a different light your purchases.

 

Quality cells sold from reputable members have a proven record of real capacity numbers, tested independently by other members.

 

Oh, a last note, just for safety: please stay safe, don't even try those cells in multiple cells flashlights. One bad cell going deplete and reverse charging from the others could well transform your flashlight in a hand grenade.

Dangerous. Not joking at all.

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DayLighter wrote:well i'd

DayLighter wrote:
well i'd seen AA rechargeable lithium up to 10000mAh, you don't think 18650 which is bigger than AA battery can reach 5000mAh? :)

Don't know if you have any basic preparation on electricity and similar.

10000mAh means 10Ah, that's 10 Ampere for one hour. Have you got an idea on how much current is that?

An average car battery (that's lead battery I know but that's just for example) has between 40Ah to 80Ah, with a peak performance of 600A to 800A for shorts burst (cranking the engine)

If your cells were really 10000mAh you could well link together 4 parallel groups of 8 cells in series and pretend them to start your car.

See the point?

Chicken Drumstick
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DayLighter wrote:well i’d

DayLighter wrote:
well i’d seen AA rechargeable lithium up to 10000mAh, you don’t think 18650 which is bigger than AA battery can reach 5000mAh? :)

Only when the numbers are totally made up lies.

A 14500 (AA size) li-ion of HIGH quality is likely to be 700-800mAh in most cases. Crapfire low quality ones are often 100-200mAh – despite what the sellers claim or the labels say. Also under high load many of the cheap batteries perform very badly.

Most 18650’s are 2200-3100mAh depending on spec. Again crapfires are likely to be less than half the capacity.

Basically buy quality and you’ll see the difference and never want budget batteries again. Smile

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I’m vaguely suspicious of the

I’m vaguely suspicious of the text on the blue 18650 -
Good 18650 5000mah.

Talk about targeting your audience.

The 26650 looks like a keygos cell but with ultrafire written on. If it was a keygos cell, I’d suggest its not a bad cell, from run times on mine, I’d accept their between 3000mah and 4000mah. With them being eBay ultrafire cells, they could be anything inside the casing upto and including 10440 cell wrapped to 26650 size.

Hkj just tested some new 26650 cells, their not available to market yet, they only just beat the king Kong 26650 capacity that has been the top dog for a while. They are protected, upto 8a.

As said, its your money, but more importantly, its your health at risk. There was a thread in the recent posts last night, its about a year old, but has some links on cells going wrong in a sealed aluminum tube with thin threads (a flashlight), it’s interesting reading, and people’s only concern here is your own health, nothing more, nothing less.

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Send all those 18650s back

Send all those 18650s back and buy one or two good ones

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DayLighter wrote:.. i'll just

DayLighter wrote:
.. i'll just gamble and hoping get lucky Smile ...

You gambled and lost on those cells.  The family-friendly nature of this forum precludes me from giving you an accurate description on what you bought.

As others have said, you are better off binning the lot and picking up a couple of Kumabear's known-to-be-good Panasonic-based cells.

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DayLighter
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thank you all for the

thank you all for the advises.. just to be clear.. i’m not a seller trying to lure customers with new batteries
i’m just a noob who found this website by accident and decided to join in Smile
i didn’t realize or never even think that batteries can in fact become hazardous to your health
the only bad experience i have .. the most was the battery got leaked and corroded inside the tube.
i just e-mail the seller and asked her which company makes this battery
hopefully i’ll get the answer soon.. meanwhile.. i guess i’ll stick with panasonic batteries for now
what do you guys think about sanyo batteries?
btw.. is there a way to test battery to see how many amp in the battery?
the only experience i have with electric is.. to turn on the switch Big smile

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gords1001
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You can buy a hobby charger,

You can buy a hobby charger, that’ll be able to run a diagnosis on any battery, have a look in the batteries and chargers section here for lots of good advice/recommendations.

Sanyo, Samsung, Panasonic, LG, all make good cells, just find a known good seller and accept that 12 dollars will likely buy two lower capacity cells (say 2400/2600mah) the difference is, these cells will actually be close to that capacity. Cool

You’ll also find these cells will actually power higher powered lights, the protection circuits will work and there’s less chance of flame/explosion/pipe bomb incidents.

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DayLighter wrote:lucky for me

DayLighter wrote:
lucky for me the seller decided to ship me extra battery no charge in exchange for 5 stars rating Smile

That speaks volumes about the sellers confidence in the quality of the cells and accuracy of the labeling.

DayLighter
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cell that jumpstart a car

check this one, he says it can jumpstart the car Smile
batteries

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Yeah, but those are LiFePo

Yeah, but those are LiFePo cells.. whole other story. Those cells you got are pretty sure crap.

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Here's what you can expect

Here's what you can expect from your "5000 mah" 26650 batteries.

http://budgetlightforum.com/node/13128#new

 

 

I sincerely hope you don't plan on using these batteries in a multi cell flashlight. 

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I get my batteries from HD

I get my batteries from HD Canada. They test every single battery they sell. Each cell comes with a sticker with the date and tested capacity.

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Ouchyfoot wrote:I get my

Ouchyfoot wrote:
I get my batteries from HD Canada. They test every single battery they sell. Each cell comes with a sticker with the date and tested capacity.

now thats the seller u want to buy from. just to reconfirm u get hobby charger to check capacity after full cycle.
Discharge > 3.7V then full charge to 4.2 volts. thats how u tell the capacity.

we’re all noob once we all made mistake of getting shit cells on ebay for cheap but u’ll learn….

a good 18650 retails for 30$ in australia so if u get it for 10 $ from overseas shipped to u its still a bargain!

just youtube some videos of exploding ebay cells Smile

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you're at the right place

you're at the right place ....you're just not paying attention .

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attitude
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leaftye wrote:DayLighter

leaftye wrote:

DayLighter wrote:
i just e-mail the seller and asked her which company makes this battery hopefully i’ll get the answer soon.. meanwhile.. i guess i’ll stick with panasonic batteries for now what do you guys think about sanyo batteries?

 

Anything from Kumabear, a member here, should be fine as long as you know what size you need and if you need protection circuitry.

 

DayLighter wrote:
btw.. is there a way to test battery to see how many amp in the battery? the only experience i have with electric is.. to turn on the switch :bigsmile:

A hobby charger would allow this test.

With a multimeter that has good leads and timer, you should be able to determine the current draw and then approximate the battery capacity by how long it takes to run a full battery to empty.

i believe the leads doesnt make any difference what so ever. with those cheap multimeter already calibrated for the lead they are using. if u change the size of it makes it inaccurate.

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gords1001
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Nope, they definitely can

Nope, they definitely can make a difference – long thin leads give more resistance to a circuit, discounting the resistance the meter adds, add resistance and current drops, hence low readings. Either get some thick wire and make some leads or buy decent quality leads, we are after all measuring pretty small amounts of current.

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I wonder when the Chinese

I wonder when the Chinese will “develope” some even higher capacity cells. Keep an eye out for the next batch, surely they’ll be in the 12,000 mah range.

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DayLighter wrote:check this

check this one, he says it can jumpstart the car Smile
batteries]

And not just any LiFePO4 cell, those are A123 Systems proprietary nanophosphate cells. There are no other cells on the market that even come close to their current handling abilities. And since A123 just went bankrupt and is in liquidation, there may never be any more.

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