Ohmash O-B18650-30G 18650 Battery 2500mAh, 30A Flat Top 3.7V Rechargeable Li-ion Batteries for High Drain Devices(2 Piece) with Free 18650 Battery Case/Holder

I gotta say, these batteries surprised me. At first, I was skeptical because the initial charge for the batteries took about 5 hours - however, after that they take less than half that time to charge! I'm able to use them in my SMOK Baby Alien at 55-60W for about a day before they begin to fade (my Samsung battery only lasted about 4 hours and only allowed up to 50W). Awesome value, too - highly recommend getting them!

I got 4 of these, to be used in a lot of my personal electronic inventions, and on a couple of SMOK Alien vaporizers. They have worked great since i got them (last year).However, take great care with the discharge level. One of the batteries died without notice (little use, never over discharged, always in a cool place) and the voltage went to 0V. Yeah, not even 0.2V. It was full one day, and the other dead. (no use).Tried a couple of ways to "revive it" (dont do it), and it wont hold any charge. So it is really DEAD. Sooo, i removed the wrapping and snooped inside.. It is really sturdy and well fabricated. No signs of it being a salvaged battery.Havent given it enough time to check if the charge is really 2500mah, but the pair im using with some electronics last as long as they should if you do the math, and the SMOK vap also lasted enough, albeit i only managed to use the pair about 4 recharges only. I might have got a dud.Thats it. It is a great battery, and as with anything, you can get a dud sometime. Still, for the price, a good bargain.

I really thought I had bought these at a vaping store. They must have been on sale. I usually stick with, for example, Panasonic or Samsung for reliability. That'll teach me.I didn't check the purchase date, but as of January 2018 they're still going strong. They charge quickly and easily last at least the whole day for me. Not that I run my rig at high wattage. I just don't like it hot.I'd even get another set, but like I said they must have been on sale.

I am not sure they last as long as they should on a charge, but that's subjective because I haven't really compared them to other brands of batteries. The flashlight I use is a ultra-bright high-discharge type, so I may be expecting too much. I am satisfied with my purchase.

Have had these for about a year now and they never fail to hold a charge. Last for several days with moderate use. They charge fully in about an hour or so. Will buy this brand again when I need them.

great for sub ohm

Bought these for the BLF A6 Flashlight from Banggood. The lifespan is good and it allows for full turbo direct-drive mode. Lovely batteries.

These batteries are a little more costly than some of the others on Amazon but I have found that spending the extra $5 is worth it (for authenticity and quality assurance).