TrustFire 18650 3.7V "2500mAh" Rechargeable Lithium Batteries (2-Pack)

Pros: - can delivery 3.8A, without significantly droping voltage.

Cons: - Capasity is only 1936mAh.
500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit

Other: - I did discharge cell to 2.75v at 0.1A.
- After that i did charge cell at 1.0A.
- At constant 3.8A discharge cell temp was about 45C.

Pros: These batteries are long lasting as rated, probably around 2400mah. I bought 4 of these and wired them as double series (7.4v 5A) to be used with my Canon HF100 camcorder. It gives me around 6-7 hours of recording per charge. I charge them with sku 06105 charger.

Cons: These batteries are not protected. But if you charge them using smart charger such as sku 06105 charger then there should be no issue.

Other: Buy a few, wire them for field use. Way better than buying high-priced camcorder OEM batteries :)

Pros: - Accurately rated, always a pro
- Very nicely build, as much as the blue ones
- Charges well, discharges well, works well

Cons: - Button on the + side, may not fit every single possible application if space is TOO tight.
- Well, uglier than the blue ones. The grey is kinda dull.

Other: If you're sure that they fit your application, use it!

Pros: I bought them to replace dead cells in a laptop battery, and they work fine. I soldered them and they took the heat well, I don't think it cause any problems with them so this made me happy.

Cons: I assumed the capacity would be lower than they were advertised, and I'm pretty sure they were. Not by much though.

Other: I guess people use these in flashlights? I used them in a laptop battery and I couldn't be happier. If you have an old laptop battery that can't hold a charge, open it up and see if these cells match. Buying these could save you a lot of money for a new replacement.

Pros: This is the perfect battery for the White Light LED Flashlight + Emergency USB Charger with Cell Phone Adapters sku.18883.
I have bought these battery as spare battery for the USB charger.

Cons: Non other than the fact that it is unprotected and you need to use a correct charger.
The other issues is that the capacity is lower than the rated by 20% or it is only 80% of the rated capacity.

Other: As we always would prefer that the price is cheaper so that we could buy more units. But since it fit my sku.18883 I am very happy about it and should not complain too much.

Pros: I also used the cells to replace my dead laptop battery cells witch lasted 5 minutes. After replacement I can run my laptop for 1h30min witch is great for my old, powerdraining laptop. The shipping was fast and the item was well packaged.
One great thing was that the positive side of the battery has a hole for easier soldering. I

Cons: - Well I'm not putting a 5 on price since cheaper is better.
- I know that you shouldn't solder directly to the battery but I did and it would be awesome if the battery had a ruffer surface on the negative side for easier soldering.

Other: If you need 'em, buy 'em!

Pros: These batteries make good replacement batteries for notebook computers that use this type of cell in their battery pack as well as tools that use lithium ion packs.

Cons: To build a battery pack, or rebuild one you should use a battery tab welder, the only con about this is the fact that DX does not carry one.

Other: DO NOT SOLDER THESE BATTERIES

Pros: - Excellent quality - No leaks - Good mah - Lasts a nice time on a flashlight - rechargeable - They are cheap

Cons: Haven't found any cons really..

Other: If you are looking good batteries for a flashlight or whatever then you should get these because these are working greatly even after many many many charges.

Pros: Nice quality so far - I see no degradation after 3 months of heavy use.

Cons: Seems to be overrated - mine can hold only 1900mAh when used as replacement in my good old Thinkpad T43.

Other: Nice cells, but not for refilling laptop batteries. Next time I'll try something other.

Pros: - I bought 3-pack for replacing old cells in Thinkpad 600 battery.
The runtime is now about 3 hours. Enough for me, despite if the battery capacity isn't real.
- Price-ratio is great. New battery for less than 20$ (3-pack).

Cons: - There is no solder-tab on minus pole. But it is possible solder a tab if you have good lead-tin and flux. Of course, you have to solder quickly and be very carefull.

Other: If you want your old notebook to mobile again, these batteries are good to use when replacing cells.
But check first that:
- Old cells are in 18650 form.
- The battery is not a smart one, which remembers old cells condition.
- You'll handle the risks and soldering.