18650 batteries
- Thread starter JRA191
- Start date
- th_trl_thread_readers 0
- Status
I use the purple efest "35a" batteries in my mechs and they're ok, but I also treat them like the 20a they are. I also use PVTSO batteries in my VF clone. They've been good so far. I use AW in my Reo.
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
Sony VTC4 or Samsung 25R.
18650 Sony US18650VTC4 2100mAh High Discharge Flat Top - Batteries, Chargers, and PowerPax Carriers
18650 Sony US18650VTC4 2100mAh High Discharge Flat Top - Batteries, Chargers, and PowerPax Carriers
I also use the VTC4 and Samsung 25R. Here is a good read on Batteries and Safety by the forums' battery guru. E-Cigarette Forum - Baditude - Blogs
Those are the ones I use also; I don't vape over 20 watts mobile anyway.
For a comparison of batteries you can click the dropdown menu on steamengine:
Battery drain | Steam Engine | free vaping calculators
I use Sony VTC4s and VTC5s, but I've recently been using Xtar's new XT-VTC4 18650/ 2200mah-25AMP flat-top batteries. I like my Xtar charging units and Xtar claims that they manufacturer these batteries, so I decided to give them a try. So far, so GOOD
Ships from California too!!
http://www.xtardirect.com/collectio...h-high-drain-25a-battery-unprotected-flat-top
Ships from California too!!http://www.xtardirect.com/collectio...h-high-drain-25a-battery-unprotected-flat-top
Last edited:
I use Sony VTC4s and VTC5s, but I've recently been using Xtar's new XT-VTC4 18650/ 2200mah-25AMP flat-top batteries. I like my Xtar charging units and Xtar claims that they manufacturer these batteries, so I decided to give them a try. So far, so GOOD
http://www.xtardirect.com/collectio...h-high-drain-25a-battery-unprotected-flat-top
"XTVTC4"
CE, RoHS
Caution labelling.
XTAR logo on the battery.
Interesting.
I've got an old Sony VTC4 in my 30W box mod, but other than that one all of my other batteries are Orbtronic SX30.
Orbtronic is also getting ready to release a 3000 mAh 20A battery. I'll be keeping that in mind for my next dual battery mod.
Orbtronic is also getting ready to release a 3000 mAh 20A battery. I'll be keeping that in mind for my next dual battery mod.
I wonder why they went with a low 20A. If they made it a 35A then we could have forgotten about the VTC5's no longer being available.
As I understand, you either have high mAh or amperage CDR, you can't have both. Unless you make purple batteries.
I started double-stacking Efest 18350s in my tube mods (Vamo, Zmax, SVD) and I rarely use those mods these days. Lately it's been VTCs in my mechs, and in regulated devices, 18650 LG HE2s and HE4s, and the purple Efest 18650s. Sometimes the Panasonic CGR's if I'm doing some low/moderate powered vaping.
My guess would be simple supply and demand. 20A batteries are in very high demand, very few people go the extra mile for a true 30A battery anymore. It would be hard to make back the investment on developing and producing a 35A battery if you're only selling a few hundred of them a month.
A 3000 mAh 20A battery though... now there is a definite market for that. Especially in dual 18650 mods that run in parallel. A 6000 mAh mod would last most people 3-5 days between charges.
I use eFest 2500 mAh, they are a good compromise. The only annoying thing is the 35 Ampere indication on the label: that 35A is not the steady current they can provide, but the 1 second current peak they are capable of.
As others have stated above, the eFest 2500 mAh are capable of a 20 Ampere steady current: they measure an internal resistance of 50 milliOhm - as all other 20 Ampere 18650 Li-Mn cells (and the 18640 Li-Po used in the iSticks, for that matter).
A 30 milliOhm internal resistance 18650 is very hard to find.
Remember that, with current IMR technology, it can't be any capacity race, and all capacity increases are obtained at expenses of cycle life, with the standard 500 cycles (at 80% EOL capacity) achieved with 2000 or 2100 mAh size cells. With a 3000 mAh cell, you can only achieve 150 cycles at 80% end-of-life capacity, 300 cycles with a 2500 mAh IMR cell. On the long run, 2100 mAh cells are the best bang-for-buck.
You can achieve a substantial life increase by recharging them when they reach 3.8 Volt OCV, or 50% discharge. The most substantial life increase is achieved by discharging them at half max current, or 10 Ampere. I am in the process of switching to two-cells MODs for this very reason, as they are getting more pleasant to the eye (and the hand), see the IPV4.
As others have stated above, the eFest 2500 mAh are capable of a 20 Ampere steady current: they measure an internal resistance of 50 milliOhm - as all other 20 Ampere 18650 Li-Mn cells (and the 18640 Li-Po used in the iSticks, for that matter).
A 30 milliOhm internal resistance 18650 is very hard to find.
Remember that, with current IMR technology, it can't be any capacity race, and all capacity increases are obtained at expenses of cycle life, with the standard 500 cycles (at 80% EOL capacity) achieved with 2000 or 2100 mAh size cells. With a 3000 mAh cell, you can only achieve 150 cycles at 80% end-of-life capacity, 300 cycles with a 2500 mAh IMR cell. On the long run, 2100 mAh cells are the best bang-for-buck.
You can achieve a substantial life increase by recharging them when they reach 3.8 Volt OCV, or 50% discharge. The most substantial life increase is achieved by discharging them at half max current, or 10 Ampere. I am in the process of switching to two-cells MODs for this very reason, as they are getting more pleasant to the eye (and the hand), see the IPV4.
Last edited:
Probably because they can no longer source VTC5's and re-wrap them with their own branding.
I think it's more a question of technological/practical/businessdecision limit.
Getting 100 watts out of a 10 watthour one ounce little battery is quite a feat by itself.
If it were feasible to produce a 100 amp, 100 watthour battery in 18650 format, with safe operation, somebody would be doing it already, and they're put their brandname and logo on the battery.
A picture of an exploded battery with a company logo on it does wonders for that company.
So true.
Purple Efest Batteries Not As Advertised
Personally, I use the Samsung 18650-25R and purple Efest 30 amp 2100mah (purchased when Efest was rewrapping Sony VTC4) in my mech. I use AW IMR's 2000mah 10 amp in my Provari.
Last edited:
Orbtronic never did that.
Their SX30 batteries are larger in diameter than the VTCs are, and they're lower mAh than VTC5s.They have the same mAh rating as the VTC4 but in tests they last slightly longer.
Plus VTC5s were only 30A batteries, not 35A.
- Status
Similar threads
- Locked
