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Here's a question for you techy guys out there: why does my VV running at 4.7v produce tons more vape than this one running at 5.0v? Could it be battery capacity? This one uses a pair of 14250's while my VV uses a pair of 14500's.If this is the reason, then I won't even consider trying a VV using 10440's.Hmmmmmmmmm
Thanks guys .. appreciate it. So someone explain ICRs to me .. do you use the same LiIon chargers or do you need different charging circuitry as well? Is the ICR cell exactly the length it specs out (I know protected Trustfires are about 2mm longer due to the protection circuitry)? Where is a good supplier of ICR batts? Thanks, Alan
Check this out over at ECF: http://www.e-cigarette-forum.com/forum/battery-issues/135545-whats-diff-performance-18650-2900mah-vs-18650-1600mah-high-drain.html#post2141259
That's exactly right T, Google is my Bitch
ICR = lithium cobalt oxide (traditional) cylindrical cellIMR = lithium manganese oxide cylindrical cellIFR = lithium iron phosphate cylindrical cellLithium Cobalt LiCoO2Lithium Cobalt is a mature, proven, industry-standard battery technology that provides long cycle life and very high energy density. The polymer design makes the cells inherently safer than "canned" construction cells that can leak acidic electrolyte fluid under abusive conditions. The cell voltage is typically 3.7 Volts. Cells using this chemistry are available from a wide range of manufacturers.The use of Cobalt is unfortunately associated with environmental and toxic hazards. Lithium Manganese LiMn2O4Lithium Manganese provides a higher cell voltage than Cobalt based chemistries at 3.8 to 4 Volts but the energy density is about 20% less. It also provides additional benefits to Lithium-ion chemistry, including lower cost and higher temperature performance. This chemistry is more stable than Lithium Cobalt technology and thus inherently safer but the trade off is lower potential energy densities. Lithium Manganese cells are also widely available but they are not yet as common as Lithium Cobalt cells.Manganese, unlike Cobalt, is a safe and more environmentally benign cathode material.Manganese is also much cheaper than Cobalt, and is more abundant.
Ultrafire 18650 Lion batteriesThey are 3.7V Lithium Cobalt Oxide cells, they are probably similar to other cells of this type in that charging rate should not exceed 1C, discharge rate should not exceed 2C, Charge should be Constant Current to 4.20V, then Constant Voltage at 4.20V till charge rate drops to ~0.1C and then terminated. Discharge should be terminated at ~3.0V under a load, rebounding ideally to ~3.5-3.6V minimum open circuit.
Most of the batteries we use for PV's are referred to as Li-ion (Lithium Ion) such as the Trustfires and Ultrafires. The Cathode material determines the the type such as Cobalt, Manganese Oxide, etc. Not sure what the Trustfire or Ultrafires are made of.Li?ion batteries come in many varieties but all have one thing in common — the catchword “lithium-ion.” Although strikingly similar at first glance, these batteries vary in performance, and the choice of cathode materials gives them their unique personality.Common cathode materials are Lithium Cobalt Oxide (or Lithium Cobaltate), Lithium Manganese Oxide (also known as spinel or Lithium Manganate), Lithium Iron Phosphate, as well as Lithium Nickel Manganese Cobalt (or NMC)*** and Lithium Nickel Cobalt Aluminum Oxide (or NCA). All these materials possess a theoretical specific energy with given limits. (Lithium-ion has a theoretically capacity of about 2,000kWh. This is more than 10 times the specific energy of a commercial Li-ion battery.)From what I've read its all about the battery's C rating which is apparently to do with the maximum rate of discharge.
Just googled for Trustfire TR18650 batteries and found this supplier who provides specs:http://www.aliexpress.com/store/802068/200293141-423888492/Trustfire-TR18650-3-7V-Protected-Li-ion-battery.htmlThey say that Trustfires are Lithium Cobalt Oxide formulation (according to your previous post these are ICR batteries. I guess the difference is that the TR18650 has a protection circuit.Ultrafire 18650's areAgain, it must be the protection circuit that makes the difference
Well that's good to know....Then it comes down to build quality, cuz the Trustfires that I've used don't have protection circuits. And they're junk compared to generic "printed" ICRs and the generic capacities are more accurate than name brands.All of the Soshines I've used are also unprotected and are significantly better than the "fire" brands as well.
Be aware that some solid color batteries are bootlegs. Look for the manufactures name or LOGO. Also, some bootlegged batts are missing the protection circuit. Look for a protrusion of a metal strip under the labeling going down the side of the batt from Neg to Pos.Even if it says trustfire or ultrafire, look for the manufacturer.
From what I have read on other forums, AW seems to have the best batteries.But much more expensive. I'd rather buy 2 Trustfires which I have seem to have good luck with.
The elite battery for those with deep pockets and some great info for everyone:http://www.cpfmarketplace.com/mp/showthread.php?230876-AW-s-LiIon-Batteries-Sales-Thread-*Part-12*
Hi TimesJust got a mod that came with 2 Joye ICR 10440P protected batteries. Are these the batts you said you liked?
Wouldn't that be because the 04050c is designed to boost (1) cell though? Are you saying that you tested both using the same current amount, like (1) cell at 2800 mah and (2) cells at 1400 mah each?And that the 08100w had a higher current output?
That's one thing really nice about the series dual cell switching mods, you don't need a high drain battery. The problem with a dual cell mod is that it's more involved to do one with non-removable cells. I really like being able to just plug-in to charge and that's easy to incorporate with a single cell. Since the high drain round cells seem to be somewhat lacking in charge capacity, I've been using the LiPo flat cells.I'm currently building a mod with this one. Check out the price!!! Then check out the max drain!!! This cell has virtually no voltage sag (>10 milli-ohms DCR). The charge density by volume is about the same as an IMR round cell, but it's flat which is highly conducive for mounting on a PCB. If you're filling a rectangular enclosure with a rectangular battery, you come out ahead capacity wise.One cautionary note, high drain Li-Ion batts are not protected so if you use them, you need to build-in reliable short circuit protection, especially for the LiPos. With less than 10m DCR, the battery I linked to can dump over 400 Amps when shorted at the terminals. That's pretty much like shorting a car battery with a monkey wrench. It could do some serious damage.
I have been using IMR's in single battery mods but hate the short life. I would like to try this one below. Any comments about them?
The link to the PTC fuse, Is that for a single 3.7v battery? I'm confuse with the spec of 3.5Amps (minimum required for ON state) and the fault current rating of 50.
Those 1000mah batteries would be nice paralleled for a 2000mah total mah.
I once shorted a battery in a boxmod I was wiring. The battery got warm and the neg spring in the box shrunk flat, breaking the circuit. Is that what you mean by a fusable spring?
Question: Can I connect (2) Turnigy 1000mAh 1S 20C Lipoly (Single Cell) in parallel and Charge in parallel with a USB charging circuit?
Like I say, I don't know much about them, but temperature sensitive springs like that are pretty common, like the ones you see in cooling system thermostats. I guess that would be how they work. Sounds reasonable to me.
