Test GTF 8800mAh 26650

HenrysCat · 2019-03-24T19:25:49.000Z

Only been around here a few weeks but I have learned a lot, so after not seeing a discharge test on here of my 'bargain' cells, I tested them with my new EBD-M05, and I guess you get what you pay for ;)

Conclusion:

AlexGT · 2019-03-24T19:44:48.000Z

They forgot to include the “O” in their label, as in “GTFO” with that crap cell…

Thanks for the review.

Nev · 2019-03-24T20:15:55.000Z

Might aswell use an AA ENELOOP PRO ,similar capacity.

BlueSwordM · 2019-03-24T20:23:58.000Z

No, it has still 3x more energy.

It seems that this cell has probably been designed to have this sort of capacity.

Super cheap to manufacture, and more profit margin than legitimate cells.

Overmind · 2019-04-17T04:52:48.000Z

Look like most fake-label 26650 cells actually have around 2500mAh which is not really that bad compared to fake ultrafire-like 18650s that can be as low as 200mAh or even lower and average at about 300.

Michael_T · 2022-04-09T15:17:08.000Z

Medical backup cells have better run capacity and decommissioned packs provide better salvaged cells at a lower cost.

DDAtt · 2023-08-06T13:12:07.849Z

I bought some of these GTF 26650 8800mah batteries on Ebay. What arrived looked identical, but instead of labeled GTF, It was Labeled GIF, and they were actually 26700 size battery dimensions. When I charged them in a 12v series, they overheated and 4 Died. I dissembled the 1st one and this is what was in there. I disassemble 3 more of these and each one had a different colored 18650 battery in it. There was no protection circuit inside either battery as advertised. When I ran a capacity test on them they each produced about 1.5mah - 1.68mah. I’m thinking they may even have been used batteries since some of them never charged to more than 3.83 volts?

GIF 8800mah 26650-186501920×2560 296 KB

Obviously no protection built in as the site advertised. A Disaster just waiting to happen. So I bought some used server backup batteries and they all seem to be working at about 80-90% capacity, and no doubt will outlast these GIF batteries.

hIKARInoob · 2023-08-06T20:42:27.098Z

Chinese Matryoshka cell.

gravelmonkey · 2023-08-07T09:22:30.860Z

Don:

I charged them in a 12v series

Eh!? Unless built into a battery pack with individual cell monitoring, I would absolutely not recommend this.