Have you had any problems w/ these batteries? I've heard many Ultrafire batteries are fake and have very low capacity.
143435
The batteries are ok,but they are definitely cheap and are not producing what is labeled on them
143436
I have no doubt that some are, Even if fresh / non rechargeable they have a modest burn time due to energy use. I keep several in my truck on the charger and rotate out before shift with a fresh charge, or before I teach class (CCW) and have not had a problem
143437
Ken, You just bought a $60 flashlight - Why would you put cheap batteries in it? I did a lot of research before purchasing my first Li-Ion powered flashlight. You just don't know what you are getting with off-brand batteries. Stick with brands like Nitecore (I use these mostly), Olight, AW, Eagletec, Fenix. They are rated from about 2600mAh to 3400mAh - Higher number = Longer run time (and recharge time).
143438
None whatsever. I am a police officer and use the light almost every day with no difficulties at all from the light or the batteries.
143439
I have had absolutely zero problems with the batteries. I ordered extra and haven't even had to use them yet. Extremely pleased with them!
143440
No problems with them, or any others I have that are ultrafire, and I have a lot of them.
1913244
Maybe, but not this one. It only tests at 2600mAh. Ultrafire does not make a 4000mAh 18650. This is a cheap knockoff with a fake wraping.
1030905
I have the charger and two batteries and have had them for about a year and a half and have not had any problem with them. I use them in a 1000 lumen flashlight and they seem to hold their charge well. Hope this helps.
882249
We have never had issues with the batteries in the past and these have worked well. I can't even give a time frame on the batteries for these but if you shop on Ebay or Amazon you can usually find better prices. Sorry no battery problems so far.
421926
I read a lot of comments after buying the batteries that there seem to be quite a lot of counterfeit ones. Mine seem to be original. On top of the battery description (CR2032 in orange) the blister is "raised. For me they appear original. Hope that they are!
89437
These are fakes. There is no such thing as a 4000 mAh 18650 battery. The company is fake, too. It spams five-star reviews for its own products. You can tell by looking at their "other reviews".
2259688
I use them in my mod, they are the longest lasting batteries I own. just make sure your mod excepts 18650's.
7335
Jared, I use the 3-Volt 18650 batteries in just about every flashlight and Laser I own. Never had a problem with them. Just make sure you use the right charger designed for them, to re-charge!
310350
I own UltraFire and Tenergy Brand of 18650@3000ma. I have 5 set of them. I only had 1 bad one that won't hold a charge in storage. The rest seem fine I measure the voltage on them to check. After a fresh charge it measure 4-4.3 volts. Then it drop to 3.8,4.1 for over about 2 month. I think like everything a little luck is involve. I read the other peoples reviews and 4-2 stars to me if the price is right I'll take a chance. So far it a good deal Beside they are all made in CHINA no matter which brand. The Trustfire charger works fine too. Voltage on batteries checked before this reply...
438182
I have this 3000 batterie on an UltraFire WF502B they work perfect so far. I think the difference between numbers is the amount of charge they hold.
1231745
I have 2. They do not work. I would never buy these again. Do you think that this is an endorsement of these batteries?
649778
If you are interested in a flashlight that will last a long time before having to be recharged, then look for those that use the 26650 batteries - either one, two or three (with an extension tube). Too many 18650 batteries with the UltraFire name are counterfeit.
1550134
It might be the kind of battery you use. I order my battery from Sure Fire, they have a 10 year shelf life and never have a problem. They cost around $20.00 for a dozen. I have been very pleased with the performance. Good Luck and Merry Christmas.
1907410
yes. I work night and use them on a regular basis. I don't have to recharge them for 3 or 4 days unless I needed to use them for a for a 4 or 5 hour stretch above my normal usage. Meaning, that these batteries will hold a charge a lot better than the aaa battery pack (about 4 times) or the 18650 cell (about twice as long) and will give you a whiter light for a time in the ultrafire flashlights.
1292522
I have several 18650 batteries. They are all the red UltraFire batteries, but I'm sure they would be the same size as yours. The single red UltraFire 18650 battery is too long and too narrow for this flashlight. At least the "AAA" batteries it takes are easy to find.
1901952
I've never had a bad battery from these. They've been all good and i''ve placed another order. You might get 1 0r 2 in the box but i hardly doubt it.
1092728
Ordered mine this week and had exp 9/17. I tried 10 different batteries from 3 packs and none lasted more than 4 hours and many within an hour. stored properly discharged for some reason I don't understand