Battery question

[Classic vaper]

I have been vaping with 18650s in my mechs since 2014. I see all this new hype for 20700 and 21700 hybrid mods and am thinking about getting one. Whats the benifits and differences between 20700 and 21700? Do they hit harder? Obviously they have better capacity than 18650s.

 

[Baditude]

I have been vaping with 18650s in my mechs since 2014. I see all this new hype for 20700 and 21700 hybrid mods and am thinking about getting one. Whats the benefits and differences between 20700 and 21700? Do they hit harder? Obviously they have better capacity than 18650s.

The main differences between 18650, 20700, and 21700 batteries are physical dimensions and specifications. Larger physical dimensions means more electrolyte can be packed inside the cell to pump up the specifications (primarily the capacity or mAH, but may increase the CDR a bit). Downside with the larger batteries is the larger dimension meaning they require a larger and heavier battery device.

Do they hit harder? I have no idea as I only deal with 18650-size batteries myself. @Mooch would be a better person to answer this question as he has done bench tests on hundreds of vape batteries.

Mooch said this about the Samsung 21700 30T:

"Right now this is the best performing cell available to us for higher power levels and unregulated/mech mod users. The 30T is a true 35A 3000mAh 21700 cell that hits harder than any other round battery we use. New cells are always coming out but the 30T is king right now.

Samsung rates this cell at 35A continuous and 3000mAh."

• Samsung 30T 35A 3000mAh 21700 Retests...an incredible 35A 3000mAh battery!

• Complete list and links for all my battery and charger tests

Click pic to enlarge to full size

 

[robrrt]

What I like about a 21700 mod is that it can drive a larger tank (like a Cloud Beast) without the hassle of pairing 18650s. I started off with an iJoy Capo (crap) and an iStick Pico S, but recently splurged on an Asmodus Amighty and I love this mod. I've been using a small variety of 40a batteries; they discharge faster, but perform better than the 30T in my opinion.

 

[DaveP]

As a MTL vaper I'm more concerned about vape time (MAH) than high current (Amp rating). The Samsung 40T 21700 fills the bill and gives me enough power to get through a day and into the next morning on a single cell at 10W. I can be away from home all day without worrying about carrying backups. The mod and a small bottle of refill juice is all I need.

 

[Baditude]

I've been using a small variety of 40a batteries; they discharge faster, but perform better than the 30T in my opinion.

40 amp batteries, you say? Which ones might those be specifically?

 

[robrrt]

40 amp batteries, you say? Which ones might those be specifically?

(heh, I knew I should've added that) Aspire, iJoy & Golisi

 

[Baditude]

(heh, I knew I should've added that) Aspire, iJoy & Golisi

• Aspire 40A 4000mAh 21700...hugely overrated, incorrect Aspire data, rewrapping

• iJoy 40A 3000mAh 20700 original five-“leg” top contact without “tabs” in the top contact cutouts...overrated but a good 30A battery
• iJoy 40A 3000mAh 20700 four-“leg” top contact (second version of this iJoy battery)...only a 20A battery
• iJoy 40A 3000mAh 20700 (third version of this battery)...hugely overrated, only a 20A battery
• iJoy 40A 3750mAh 21700...hugely overrated but better than NCR20700B

• Golisi S30 25A 3000mAh...only 20A, about equal to HG2
• Golisi S32 30A 3200mAh 20700...it has changed, now only 25A
• Golisi Black S35 30A 3750mAh 21700...accurately rated, great performer, LiPo chemistry

• Complete list and links for all my battery and charger tests

• Mooch's Recommended Batteries

None of the batteries that you listed are actually 40 amp batteries. Battery Mooch bench tests batteries for accurate specifications, performance and safety for a living, and often finds the advertised specifications to be hugely exaggerated. I hope you haven't built your RBA's without some headroom of safety because the batteries that you have chosen are terribly over-rated.

I've been using a small variety of 40a batteries; they discharge faster, but perform better than the 30T in my opinion.

 

[robrrt]

None of the batteries that you listed are actually 40 amp batteries. Battery Mooch bench tests batteries for accurate specifications, performance and safety for a living, and often finds the advertised specifications to be hugely exaggerated. I hope you haven't built your RBA's without some headroom of safety because the batteries that you have chosen are terribly over-rated.

As stated earlier, they perform well for me & {checks forum assigned} I don't build
Appreciate the links regardless