First time buying batteries, please help.

[shinimouri25]

For my birthday back in November my father upgraded me from my MVP2 to a Stingray clone and I haven't looked back. With it he bought me two 18650's so I never had to look into batteries. Recently I accidentally overused one of them to the point where it will no longer accept a charge so I need to shop but I need some help.

I like the 18650's but they are just a little too tall so my mod won't completely screw shut (I always have some thread showing) and this causes the thread to "pop" if I tighten it too much (I have also heard that this isn't an uncommon issue). I wouldn't mind sticking with an 18650 if it's my best option but I am open to suggestions.

I am looking at AW batteries but I don't know what the sizes mean, like are they all the same diameter (the images for some look thinner)? What would work best for my mod? I really don't know much of anything and I feel a bit lost in this right now.


Thank you all for any help and suggestions.

 

[State O' Flux]

The first two numbers ('18'), is the diameter in mm. The second two numbers are the length ('35, '40', '50' and '65'), in mm. The last number designates a ('O') round battery.

Each battery length has it's own Maximum Continuous Current Discharge (MMCD) rating, and you need to make sure that your net resistance doesn't drain the battery at a value greater than it's MCCD.

A simple Ohm's law formula, where V (volts) ÷ R (resistance) = C (current or amperage). For example, if your resistance is 0.5Ω, you divide that into the 18XXX series battery fully charged voltage of 4.2v, which will equal 8.4 amps.

The battery you need to use will have a MCCD of at least 8.4 amps, or better. An Ohm's law calculator is the easiest way to arrive at the necessary value.

 

[shinimouri25]

now I know that the 18650's fit like a glove diameter wise, what could go wrong if I used a smaller diameter?

 

[Ryedan]

A simple Ohm's law formula, where V (volts) ÷ R (resistance) = C (current or amperage). For example, if your resistance is 0.5Ω, you divide that into the 18XXX series battery fully charged voltage of 4.2v, which will equal 8.4 amps.

The battery you need to use will have a MCCD of at least 8.4 amps, or better. An Ohm's law calculator is the easiest way to arrive at the necessary value.

now I know that the 18650's fit like a glove diameter wise, what could go wrong if I used a smaller diameter?

shinimouri25, pay particular attention to State O' Flux's statement above. Amp discharge capability is one of the most important battery requirements that need to be met for safety reasons.

There are smaller than 18 mm Li-ion batteries out there, but they will have lower amp and mAh (miliAmp hour) ratings so they will need to be charged more often. Your Stingray clone takes a 18xxx battery and if you put a smaller diameter batt in it, the battery could move off center at the positive end and hard short. This is one of the worst things you can do to a battery and it can become quite dangerous.

If you want to go with smaller batteries, buy a mod that takes smaller batts

Here are a few known, good suppliers that sell authentic batteries;

Illumination Supply
RTD Vapor
Lighthound
Orbtronic
Battery Junction

Here's a chart of some typical batteries for vaping and their amp ratings. It's a bit out of date so it's missing some of the most recent additions but it will get you started. Ask if you need more info.

 

[shinimouri25]

Your Stingray clone takes a 18xxx battery and if you put a smaller diameter batt in it, the battery could move off center at the positive end and hard short. This is one of the worst things you can do to a battery and it can become quite dangerous.

That is what I had thought but I wasn't sure.

If you want to go with smaller batteries, buy a mod that takes smaller batts

I'm not particularly worried about getting thinner batteries It was most a simple curiosity on my end

Thank you both for this information. It's been really helpful and given me a lot to think about

 

[ChristianProgrammer]

"18650's but they are just a little too tall so my mod won't completely screw shut (I always have some thread showing)"
Dude there are pins at the top and bottom to address that the mod should close or you've got other problems (... shakes head)