18650 battery question

[randpost]

a 18650 ultrafire 2400mah battery last for days for me, but I usually switch batteries after a single day of heavy vaping since I see some decrease in battery strength.

Longest I have used a battery is for 48 hours and it still wasn't dead when I changed it out, but vapor production decreased quite a bit.

Just recently bought a 6 pack of 3000mah 18650 ultrafire batteries, but I really don't notice a difference. If there is a difference, It is slight. Plus I read in a few flashlight forums that these batteries and a few other ultrafire types are overrated. One for example is the 10440 500mah. They last exactly the same time as the 360mah counterpart. Tested in a small lumen flashlight.

 

[justrubl]

ok...i have a question...i have the v1 sb and got the extended sleeve...the vapor is more with the smaller battery....i dont have a meter to test the batteries....has anyone checked these

 

[cddz]

ok...i have a question...i have the v1 sb and got the extended sleeve...the vapor is more with the smaller battery....i dont have a meter to test the batteries....has anyone checked these

Sounds like the 18650 has issues, I tend to get a bit more vapor from the 18650, mostly to do with thr higher cut off voltage.

 

[BrockJ]

I change mine every afternoon when I come in and they take roughly 2 - 2½ hours to top back off.
Some of mine seem to be better than others. I think it's just the nature of the beast.

The protection board can play a role in charge times and output if it or the battery is faulty. They're basically light bulbs. Some last forever and some go out in your hand.