The red ones are some of the worst 18650s out but for the $25 shipped for all of them, it is dirt cheap and actually a good deal. If I didn’t just obtain enough 18650s for a while, I would snap them up just to have some batteries.
Well, I’ve got plenty of the red ones that have been hardly used collecting dust, like at least 6 of them. Given half an hour in my ultrafire C8 at around 2.5A and they’re exhausted, or just can’t hold the voltage. Probably o.k if you’re using R2’s, I wouldn’t recommend them for xml lights. Sometimes they would only last around 20-25mins. They all look genuine, and at least some of them would be. But then again, I’ve also got one Uitraflre or whatever the mispelling was.
I run these in my SSC-P7 light at around 700+ Lumens for WELL OVER an hour. ALSO my XML Lumintop TD15X’s at over 700 Lumens for about an hour and a half each go around. All four of them.
What is even more strange is that these deliver solid power up unto the end. My Panasonic 2900’s gradually dim throughout the discharge. ((Wondering))
If I have such a good batch, maybe I should keep em. =)
Ultrafire batteries are not known to have true capacity labels, nor the ability to withstand high current flows.
Sorry but even if yours are amazing, you’ll have a hard time trying to convince people that these are good batteries, because these just have such a bad track record and are inconsistent why would anyone take the risk. Sure they’re cheap, but batteries are one of the few things that you do NOT want to cheap out on, for safety and reliability reasons.
Well, it appears some have had some bad experiences.
I for one just had to RETURN some defective Panasonic 2900’s.
My FIRST attempt in upgrading. I since have bought some other Panasonic 3100’s. They are ok, but they do not hold voltage so well towards the end of their charge.
At least my Ultafires have held up strong to the bitter end.
Furthermore, I have some 4000 Ultrafires that to date have done nothing but impress. Even my Panasonic 3100’s do not last as long…
As far as the actual milli amps are concerned….some batteries spend those faster than others resulting in more or less time than the other.
In defense of the seller, he is selling them dirt cheap. 10 batteries for $25 shipped. That is $2.50 each. If I had not just bought enough 18650s to last me a while, I would buy them.
They are not the best but they are protected so you can run them in your multi cell lights.
I am surprised these batteries are still here. Also, you guys are giving him a bit of a hard time. He is just selling some cheap batteries at a cheap price. That’s kind of what we like around here.