18650 2800mAh Power rechargeable battery
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Ray_of_Light
Flashlight Enthusiast
I bought some of the GTL 2800 mA/h.
They are 1400 mA/h.
They have a low internal resistance for the price. Not good to build a battery pack, since their self-discharge rate is not uniform among samples.
I havent' cut open them, but all electrical indicators point to a hybrid chemistry, 4/5 LiMn + 1/5 LiCo, which is much cheaper than 5/5 LiCo.
Anthony
They are 1400 mA/h.
They have a low internal resistance for the price. Not good to build a battery pack, since their self-discharge rate is not uniform among samples.
I havent' cut open them, but all electrical indicators point to a hybrid chemistry, 4/5 LiMn + 1/5 LiCo, which is much cheaper than 5/5 LiCo.
Anthony
+1 on the 1400mah
jasonck08
Flashlight Enthusiast
Ahhh but the auction states "100% Authentic & Hight Quality items." So how can it not be 2800mah actual capacity? 
45/70
Flashlight Enthusiast
Ahhh but the auction states "100% Authentic & Hight Quality items." So how can it not be 2800mah actual capacity?
Wait a minute though. They misspelled height!
Dave
Ray_of_Light
Flashlight Enthusiast
Twenty of the GTL18650 measured 1400 mA/h consistently, with very little variation. Except the capacity, they are of "hight" quality, indeed...
Paid the GTL less then 2$ each, shipped. A good Sony, Panasonic or LG 18650 cell with real 2400 mA/h capacity cannot be had for less then 6$.
I don't know why the label indicates the double of their real capacity. They are targeted to a market of which we have no inner knowledge.
I can add that I bought some Ni-MH AA at the same place, for very little price (these batteries are labeled "BTY-2500 mA/h"), which had a solid 600 mA/h capacity - and a so fast self discharge that makes them useless.
In the long term, notwithstanding the penny price of their batteries, these sellers are only harming themselves.
Regards
Anthony
Paid the GTL less then 2$ each, shipped. A good Sony, Panasonic or LG 18650 cell with real 2400 mA/h capacity cannot be had for less then 6$.
I don't know why the label indicates the double of their real capacity. They are targeted to a market of which we have no inner knowledge.
I can add that I bought some Ni-MH AA at the same place, for very little price (these batteries are labeled "BTY-2500 mA/h"), which had a solid 600 mA/h capacity - and a so fast self discharge that makes them useless.
In the long term, notwithstanding the penny price of their batteries, these sellers are only harming themselves.
Regards
Anthony
old4570
Flashlight Enthusiast
They work out the capacity for a pair of GTL's , 2x1400 = 2800
jasonck08
Flashlight Enthusiast
Has anyone tried to test the discharge capabilities of the cells? Someone above mentioned it may be a IMR / LiCo Hybrid.
The material to make an IMR cell costs about 1/2 what it does to make a LiCo cell.
The material to make an IMR cell costs about 1/2 what it does to make a LiCo cell.
aurum
Enlightened
hmmm ... what is the reason for the fact that AWs IMR are that expensive?
old4570
Flashlight Enthusiast
jasonck08
Flashlight Enthusiast
The fact that he has a monopoly of the CPF Li-ion battery market maybe? Trust me, I've talked to many battery factories and IMR's are definitely cheaper, especially when you factor in the extra money for the LiCo's PCB.
Interesting. I was looking more for a chart that shows the cells at different discharge levels 1A, 3A, 5A, 8A etc. By the looks of your chart and the voltages, it almost seems like its an IMR cell or perhaps NCM chemistry (part LiCo part IMR) considering the initial current is higher then the other cells you tested.
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aurum
Enlightened
Any idea where I can buy cheap IMRs?
