Batteries

[Johnnyboy]

These questions have probably been asked 1000 times before so I apologise in advance.

What's the difference between button tops and flat tops other than appearance and length?

Will completely discharging the battery shorten it's life and if so what minimal volts should I be looking at before sticking them on charge?

Currently using efest 18350s which read 4.1v fully charged and I must say I'm finding they don't last long at all on the SVD. Looks like new batts are on the cards, which presents a dilemma as I don't want a light saber but I do want a longer vape time. 18500 look like a good option.

 

[RunAway]

18650 lasts longer. I think you discharge down to approx. 3.2 volts and should be 4.2 volts when fully charged? But i'm no expert, you should get more info soon. Or else try an MVP it has a massive battery which will last you days......

 

[mrmattlaw]

My efest batteries all show 4.1 when charged and I change them at 3.3 when my Vamo tells me they're low. I do notice a massive drop in performance at 3.5 though.

 

[Mostly]

18650 are the way forward should last a day or so
http://www.vapegear.co.uk/Batteries_and_Chargers/cat1826720_1971846.aspx flat top

 

[vaporsizer]

Your 18350 batts won't last long, that's pretty normal. If you go for a bigger size look out for the amp hours (Mah), that's what want for discharge over time.
Don't over discharge your battery, just don't. It will put it under more stress & yes, it will shorten it's life. I charge mine when they get to between 3.6v & 3.7v depending on how they are performing. You can tell when they're running near that because the performance will dwindle.

When they finish charging they should read around 4.1v - 4.2v. They can't accept any more so it's no good trying & a good charger will detect a full charge & switch to monitor mode or will switch off.

If you want some 18500 batteries, torchy (Find him on ebay) supplies some good ones with 1600mah & pretty high discharge for the size.
http://www.ebay.co.uk/sch/big_f_d_d...h=item43c6eda55f&rt=nc&_trksid=p2047675.l2562

They lack the full oomph of some bigger 18650's but are still a good battery. (Looks like those ones are out of stock at the mo')

More useful battery info here.... http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries

 

[Johnnyboy]

Thanks for the info guys. What's the difference between flat and button top?

 

[Johnnyboy]

Also, ICR or IMR, does it matter in a vv/vw? I won't be mech modding

 

[vaporsizer]

Also, ICR or IMR, does it matter in a vv/vw? I won't be mech modding

This, i ripped from elsewhere....

ICR - the usual type of LiIon batteries.
IMR - has less capacity and can deliver higher current.
IFR - is a lower voltage.

http://www.candlepowerforums.com/vb/showthread.php?317698-Lithium-IMR-vs-ICR-vs-IFR

 

[vaporsizer]

Further rip off material.....

In the case of IxR, the first Letter "I" just means that the cell is a Li-ion rechargeable. Second letter refers to the cathode material. The last letter "R" just means the cell is round.

ICR = Li-ion Rechargeable, the "C" = Cobalt.

IFR = the "F" stands for the element "Fe" which is Iron

IMR = the "M" stands for Manganese, or "Mn".


Unless you are trying to draw a lot of current from the cell, most people use protected ICR cells to power their lights because they offer the most energy density. IMR's are more often used for higher current applications, and these cells require more care because there is no protection circuit and its easier to over discharge the cell.