Well they did it.... A 5000mah 18650 battery!

some feedback

0 Buyer: Oct-20-11 21:30
GYRO Metal 3-Channel SH Micro Mini RC Helicopter 6020-1 (#270614370067) US $12.88 View Item GYRO Metal 3-Channel SH Micro Mini RC Helicopter 6020-1
the seller don't want fix my probleme Buyer: Oct-20-11 21:24
42 inch GYRO 8005 Metal 3.5-Channel RC Helicopter BIG (#280737568753) US $99.99 View Item 42 inch GYRO 8005 Metal 3.5-Channel RC Helicopter BIG
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8x Rechargeable CR123A CR123 Battery 3.0V 1200mAh GTL (#280477916443) US $19.88 View Item 8x Rechargeable CR123A CR123 Battery 3.0V 1200mAh GTL
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Total garbage Does not work ,CHEAP sh--! DO NOT BUY!!!!!!!!!!!! Buyer: Oct-13-11 18:16
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He only shipped to me 2 batteries Buyer: Oct-02-11 17:25
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pas recu comme la photo et le descriptif Buyer: Oct-02-11 01:32
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picture shows plug for charger as one that works in the usa. Buyer: Sep-29-11 08:05
36inch GYRO 8501 SKY KING 3.5-Channel RC Helicopter RED (#280705080296) US $102.11 View Item 36inch GYRO 8501 SKY KING 3.5-Channel RC Helicopter RED
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item is very old, does not work. Buyer: Sep-27-11 21:22
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The worst seller ever, bad communication, never got the good. DO NOT BUY!!!! Buyer: Sep-26-11 17:05
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I have not received my batteries Buyer: Sep-25-11 22:46
2 pcs X AAA BTY Rechargeable Battery 1000mAh Ni-MH 1.2V (#270809451830) US $1.34 View Item 2 pcs X AAA BTY Rechargeable Battery 1000mAh Ni-MH 1.2V
Fraudulent compacity claims. Batteries tested around 300mHa (MH-C9000) Buyer: Sep-25-11 17:21
8 AAA 1800mAh 1.2V Ni-MH rechargeable battery green new (#290538177752) US $4.18 View Item 8 AAA 1800mAh 1.2V Ni-MH rechargeable battery green new

Wow 5000mAh, I'm getting mine soon

In the description it's missing the "Discharge Rate = 15A"

There is a report button on Ebay .

This is obviously fraudulent ... 5000mAh capacity claim

So there is the option to report such to Ebay , but then there is the issue of Ebay doing ??

And since 99.999999 - something % of the earths population wont see this thread .

preaching to the quior comes to mind .. [ not that anyone is preaching ]

Just that we know , and knowing that a lot of folks dont know , I guess can be frustrating .

You know

I don't know if this belongs here or deserves it's own thread, but in varying applications one might want to consider "useable" mAH.

A cell can have an X capacity, but once it reaches a certain ability to deliver energy to the end of circuit it will fall off/fail to deliver.

Just an observation, once a 3.7v battery regardless of capacity reaches 3.8-3.6v perfomance falls off greatly or fails. ( again depends on what your device is capable of using)

Charge it at this point. the remaining mAh is moot.

I'm sorry

Bring it on , [ as in please share ]

Google is a great search engine but unfortunately it doesn't filter out idiocy.

I had the misfortune of being googled here, only to discover a camel pile of dung. Not a single post above came up with anything substantial, only slurs and rants. No one offered anything worthwhile like WHY these 5000mah batteries might be bad. Did anyone do any measurements? Can anyone tell if even a modest 2400mah battery is genuinely of that capacity?

There will always be liars, as long as there're idiots who believe in them.

So enlighten us, FlashFreak. If you want to plunk down some money on some obviously fake 'camel pile of dung' batteries and test them, go ahead. Please feel free to report back when you are done with your tests. We'll just be hanging around here twiddling our thumbs and making fun of other fake crap.

Flashfreak, you're new here with 2 posts, so I'll try to be gentle.

People that know about batteries know that the max you can can buy nowadays is 3100 mAh, and even that's within certain technical constraints. 5000 mAh batteries might exist in a Panasonic lab or NASA, but they don't exist in the real world. That's why we can heap scorn on an ebay d**cheb*g like this.

To answer your other question, there are some 2400 mAh batteries out there that are actual capacity. There are others that aren't.

If you spend a bit of time here, you'll be able to know the difference.

no - absolutely no one here measures the discharge capacity of their batteries - ever

How do you pronounce mah, is it pronounced (m-a-h), or (ma)?

mAh

milli-ampere-hours

He isn't even good at erasing the original markings before slapping on the fakes.

Nah dude, 15A is baby’s task for those batteries. They can do 150A with ease.

actually 150A is possible to do (and so is 250A) for a 5000mAh mAh battery: http://www.hobbyking.com/hobbyking/store/__17271__Turnigy_nano_tech_5000mah_1S2P_50_100C_Hardcase_Lipo_Pack.html :p

With our revolutionary new technology called "lying" we can make our cells do anything at all.

150A discharge? Not a problem!

Technology is called “not being classic Li-Ion chemistry” in case of thing I linked to, not “lying” :stuck_out_tongue_winking_eye:

Sorry, I didn't see the link at the bottom of your post - my office is too brightly lit for pale grey tiny text to show up. I'm pretty sure those do - but not in an 18650 size.

But they do 5000 mAh and 250A continuous in just a bit over 18650 volume (pi*18265 = ~660 cm3), and BOATLOADS less than 26650 volume (almost half, in fact - pi262*65, 1400 cm3), being 810 cm3. :stuck_out_tongue:

Should be pi * r squared, not d squared. so is 3.14159 * (9*9) * 6.5 = 16.54cm3 or for a 26650 pi*1.3*1.3*6.5=34.51cm3

The HobbyKing pack is 9.32*4.7*1.85cm = 81.04cm3 - or about the same as 5 18650s.

Using 5 IMRs in parallel (same volume, though I suspect rather more weight and bulk) you should be easily capable of 100A - just not for very long. At best 40% of the capacity

Apologies for the pedantry - I used to teach this stuff.

Oh gee, I failed quite hard on that one. Shame on me :frowning: