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  1. M

    3.7 18650 stops working as soon as I touch an LED light to it ? What the HELL?

    Why are these UF3000s so popular here, anyone ever look at a graph of their horrendous voltage under a load or poke around the web to see all the complaints about failed PCBs? The best place for them would be your local hazardous waste collection.
  2. M

    UltraFire 18650's 3000Mah Unrealiable?

    The UF 3000 is perhaps the worst possible 18650 that could possibly be selected for the purposes of vaping. Under light loads it is capable of achieving pretty high capacity performance, however, vaping is not a "light" load. Under the typical loads presented by serious vapers, the UF3000s fall...
  3. M

    what charger to buy for AW IMC 14500 batterys?

    I would suggest against the WP2 until further notice. Initial indications from some people who have purchased and tested these (in the flashlight world) suggests that this particular model, like MOST li-ion chargers you will find out there, does not properly terminate the charge. The Pila IBC...
  4. M

    Protected batteries?

    Most li-ion powered consumer electronics have a single global protection circuit for the cell/s, and implement proper charge algorithms. Stacking protection will hurt performance as each protection circuit adds resistance to the circuit. When dealing with the relatively low resistance loads...
  5. M

    RCR123A 3.7V 800mAh protected batteries

    Pretty much all RCR123 3.7V cells are 550-650mAH capacity, any label rating above that is an exaggerated claim. Unfortunately, even AW over-rated his RCR123s by a larger margin than we normally expect from him. Under the high loads of a ecig, an IMR16340 will actually deliver equal or better...
  6. M

    Protected batteries?

    LiCo cells generally don't go fiery death during a discharge, it's normally during a charge. That said.... The quality of the cell is almost always more important than PCBs. A cheap random chinese cell with a protection circuit is no safer (and probably less safe) than an unprotected modern...
  7. M

    will a 4.5V/1600mA AC-to-DC Power Adapter work for a 510 PT?

    "C" ratings are a function of time and really shouldn't be calculated from exaggerated label capacities. If a cell is rated for 1.5C discharge rates, that that basically means that the load should not drain the less in less than 40 minutes of operation. Many cells are rated 2C, that means that...
  8. M

    Current Regulation?

    No arguments about the PWM. I just made the exact same point about PWM being perfectly fine to drive an atty in another thread last night. I'm bringing the concept of using these already available current regulators to light because I suspect that the community has likely overlooked this...
  9. M

    Current Regulation?

    I have a regulator in an LED flashlight here in front of me that does 6A to the die. Granted it's not the most efficient regulator and needs a lot of overhead voltage to work right, it's a compact round board regulator doing 6A into an LED. I have another LED head for the same flashlight that...
  10. M

    The ABCs of batteries

    Hello mogur and other ECF members, I just recently joined this forum and have been browsing around quite a bit. Upon finding this thread, and realizing that it has been relatively active through it's life I figured there'd be no harm in joining in on the conversation. Just reading the first few...
  11. M

    will a 4.5V/1600mA AC-to-DC Power Adapter work for a 510 PT?

    I'd say there is a good chance of success... Here are some considerations though: If this is a standard transformer style AC-DC adapter (I like to call them "wall-warts") then the actual voltage will vary with load. It's not uncommon for the open circuit voltage to read 50% higher than the...
  12. M

    Mod types

    The amount of wasted energy depends on the type of regulation going on. Many regulators simply shunt off excess voltage via a variable resistive behavior that does just waste the excess voltage (converting it into heat). On the other hand, buck style PWM, which is producing an RMS voltage at the...
  13. M

    Just ordered my first e-cig! Thank You ECF!

    Great resource here and lots of friendly people. I really appreciate the help I recieved and can now share with you what I decided to buy in the end... 1x The BB from AltSmoke 1x Yeti-C 5pk - 510 Cartomizer (low resistance no liquid) 2x 510/Yeti Atomizers 1x 5PK Round tip Carts 1x 5PK Flat...
  14. M

    Current Regulation?

    I was just wondering if anyone has experimented with the current regulation instead of the usual voltage regulation. (for the sake of doing so more than anything) It would require careful planning on atty/current combos, but I think it could be done.... just as an example: A boost regulator...
  15. M

    Mod types

    As I understand: A boost regulator will reduce available operating time and increase the load on the cell compared with direct driving the same atty. Boost regulation works by creating a lower resistance load on the battery than the final load thus exchanging an increase in current flow from the...
  16. M

    quick question on Voltage

    Anything less than a 3 Ohm atty will cause a drain rate on the cells in excess of manufacture recommendations.
  17. M

    battery's or charger?

    Use a DMM to see if the cells are charged up and what kind of voltage they will hold after a charge. 4.15-4.25V is a fully charged cell. It should hold above 4.10V after a day of rest if the cell is in decent shape. A heavily abused li-ion cell can be dangerous to recharge. e-cigs can be very...
  18. M

    Reomend me a E-Cig meeting the following criteria...

    :) nah, The water feels pretty nice... It's just a side-step from my flashlight hobby in many respects. I just can't decide what to order. Debating between a 14500 or 18650 powered unit. (size vs runtime at this point in time). I think I only have a single flat top protected 14500 floating...
  19. M

    Reomend me a E-Cig meeting the following criteria...

    Lots of unnecessarily dangerous chargers shipping with a lot of these "mod kits." Scary to think how many people here are probably using them.
  20. M

    Reomend me a E-Cig meeting the following criteria...

    Just doing some looking at some of the things mentioned and noticed how cheap a 5 pack of 510 compatible "cartomizers" is. With that in mind I can start off either way (atomizer/cartridge or "cartomizer") and probably be happy..
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