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RX200 batteries?
- Thread starter SertraOD
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I think the way to calculate what batteries to use is
max watts(either the highest the device will go or the highest you will be using it at)
divided by the number of batteries used,
and finally divided by 3(for the rx, others are usually 3.2) to get the max amps
LG HG2 are 20 amps so you'll want to be using it at no higher than 175W to have a little wiggle room
I think that is right but I'm going off my memory, so maybe others can verify my results before you go out and spend any $$$
max watts(either the highest the device will go or the highest you will be using it at)
divided by the number of batteries used,
and finally divided by 3(for the rx, others are usually 3.2) to get the max amps
LG HG2 are 20 amps so you'll want to be using it at no higher than 175W to have a little wiggle room
I think that is right but I'm going off my memory, so maybe others can verify my results before you go out and spend any $$$
VTC/25r/HB/HD batteries for the RX200 if you want to build low or pump the wattage. It suggests 25a+ batteries which I believe can be read that it will pull up to that much out of your battery before making conversions to adjust the output. As far as how low, it's limited to .1Ω in wattage mode, that's lower than would be safe on the amperage rating of this setup without regulation chips but that's what it's for, to make it safe. But, again if you're going to go below .21Ω you're probably going to be pulling more than 20amps from the battery if my assumption is right in reading their warning.
You can build as low as the mod will fire without worrying about your batteries; that's what a regulated mod is for. Battery amp draw is controlled by set watts and battery voltage. There is a formula for determining this, which I will cheerfully post if you are interested, but the bottom line is the RX is safe (just by barely) out to 200 watts on 20A batteries. It calculates out about 19.8 amps. That's closer to the limit than I like to go, but still within spec.
Occasional use in the higher wattage range will not be harmful on the HG2s (or the Samsung 30Qs, a most similar part) and I recommend them. The battery life is phenomenal. HG2s are what I use in both of mine. If, however, you intend to routinely vape above 160-170 watts-- especially chain vape-- or you're going to install and actually use the 250 watt firmware, I'd probably lean toward VTC4s or LG HD2Cs.
Occasional use in the higher wattage range will not be harmful on the HG2s (or the Samsung 30Qs, a most similar part) and I recommend them. The battery life is phenomenal. HG2s are what I use in both of mine. If, however, you intend to routinely vape above 160-170 watts-- especially chain vape-- or you're going to install and actually use the 250 watt firmware, I'd probably lean toward VTC4s or LG HD2Cs.
Curious, where did you find that 19.8amp input limitation? All I saw was their note of 25amp recommendation. I bought a set of 30Qs for this badboy as well, works fine, but I also don't go too nuts on the wattage regularly.
I would suggest the LG HG2s (3000mAh), They are the ones I use in my RX200, and they can handle anything you can toss on this mod. The Mod has a 9V output limit, so that's what we'll work with since it will be the ultimate limiting factor here (regulated mods will start utilizing Volts when enough Amps can't be achieved for the set Wattage).
Math Time:
With 9V (max V), a 0.45Ω coil will produce 180W with a 20A draw.
With 9V (max V), a 0.32Ω coil will produce a full 250W with a 28A draw.
LG HG2s have a CDR of 20A, with a Pulse of 30A+
Just for shits and giggles, I purposely built 0.3Ω coil, just to push the mod to the Max and see how it would handle it. At 250W, I was able to fire the mod 10 times for 5 seconds each with 1 second pauses, without the batteries getting hot. I don't know of anybody who chain vapes at 180W, let alone 250W, so I think it's safe to say these batteries will handle damn near anything without issue, and with 3000mAh, they'll last longer than any other cells with a 20A+ rating.
Math Time:
With 9V (max V), a 0.45Ω coil will produce 180W with a 20A draw.
With 9V (max V), a 0.32Ω coil will produce a full 250W with a 28A draw.
LG HG2s have a CDR of 20A, with a Pulse of 30A+
Just for shits and giggles, I purposely built 0.3Ω coil, just to push the mod to the Max and see how it would handle it. At 250W, I was able to fire the mod 10 times for 5 seconds each with 1 second pauses, without the batteries getting hot. I don't know of anybody who chain vapes at 180W, let alone 250W, so I think it's safe to say these batteries will handle damn near anything without issue, and with 3000mAh, they'll last longer than any other cells with a 20A+ rating.
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It's not a recommendation, it's a calculation: 200W / 10.2V = 19.6A. Both my RXs kick batteries as "discharged" at 3.45-3.5V. I used 3.4 (times 3 batteries) to derive the 10.2V figure. Note I did not calculate for board losses. Figuring 95% efficiency, that would bring it to about 20.5A. The bottom line is still the same: 160-170W, fine all day. If you start getting above that routinely, I'd pick stiffer batteries and put up with the capacity loss.
Get authentic SONY VTC5, they're the best of the best 18650s
I'm uncertain of these HD2C's. Official specs list them as 20A, but apparently people have ran tests and they pretty much match VTC4's?
Are you CERTAIN of this?
Check out this thread on this board. @Jon@LiionWholesale has these batteries in stock, at a crazy low price, and he says their tests show them to be superior to the VTC4. Jon has not yet had time to write up the test results, but we are expecting them as soon as opportunity permits, and they will probably appear in the thread I linked when they do show up, so you might want to watch it and read it when it gets in. In addition, @Mooch has posted (over at the "other guys") this thread containing his rating and test data. He rates it as a 25A CDR battery.
I have not tested these cells myself; I am not competent and haven't the equipment. I don't know what you may think, but when Mooch and/or Jon tell me something, I am inclined to believe them. YMMV, so you make the call.
I have not tested these cells myself; I am not competent and haven't the equipment. I don't know what you may think, but when Mooch and/or Jon tell me something, I am inclined to believe them. YMMV, so you make the call.
I know your question was about batteries but I wanted to point something out I've recently run into. I know you frequently hear people recommend that its best to use an intelligent external charger on mods that have a built in charger. I personally use a NiteCore D4 due to convenience but I've never seen a compelling need to only do so on single and dual battery mods. The only discernable difference I've noticed is charge time. However, I decided to do some more testing on this one as it's a triple cell. Sure enough, after multiple tests I've repeatedly seen that it's possible to get the batteries out of "synch". Specifically, cells will show fully charged and one about 50-60% charged. This is not a good thing. I'm going to try and reproduce on another one, but I find it likely that the internal circuitry isn't able to properly insured the cells stay equally charged. Due to that, I would VERY strongly suggest that you only use an external charger on these. I'll follow up when I've tested on a second device. Other than that BTW, I'm finding this device to perform extremely well.
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What I don't get is why they insist on including internal charger and then warning users NOT to use them
My best guess, is it'll get you by in a pinch. I've used it when I ran dead on the way home. Units like the Joyetech Cuboid work perfectly well with the on-board charger. Heck that one even gives you an accurate battery meter per cell. I think in the case of the RX200, it's just too much to ask of your typical 1A wall charger. I'm half tempted to disassemble one to examine how the RX200 charging circuit is wired up.
I was recently posed with the same question, what battery should I use for my recently acquired DNA200, my first instinct was to make a post like you did here. I felt I would all kinds of opinions from people much more knowledgeable than me about batteries and Vaping. Instead I texted Jon at liionwharehouse, he asked me a few questions, what watts I would be vaping at and the device I would be using. I told him probably an average of about 70 to 80 watts. His recommendation was the LG HG2. That is information I received that I thought I would share from Jon. Yes, I too wanted the VTC5 but they were out of stock.