4 amps is a bit high. I thought the booster needed 2.5 amps to bring 3.7v up to 5v. Speaking of, I know these batts can handle at least 2.4 amps seeing as I can use my Cisco LR 1.5 ohm atties with them no problem. I know they can handle at least 2.4 amps, so they should be able to handle the amps required of the booster (according to ohms law).
Battery Life: Booster vs Regulator
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The current limit is on output. The battery will drain quite a bit higher in order to produce that much power. You can calculate the exact theoretical current by calculated watts output and then using the battery voltage (You should use the lower end of the cycle to ensure the battery can meet the demand during that time) to calculate the current from the battery. You then divide that value by the efficiency to get the drain. The caps and proper placement will have an effect on the peaks that are pulled from the battery so they are quite important.
If you do want to try with a solid battery, the AW 2600 or AW 2900 both leave a reasonable buffer. The Tenergy can cut out if you push the higher current/watt range.
If you do want to try with a solid battery, the AW 2600 or AW 2900 both leave a reasonable buffer. The Tenergy can cut out if you push the higher current/watt range.
I guess I'll just have to use batts that have a heck of a lot more mah, and maybe some high-drain batts, but that brings me back to my original point in the first post. These boosters seem to need special batts that are more expensive, but regulators can use the El-Cheapos.
That's true. But with boosting you can fit more energy is the same amount of space (no lost space due to terminals), a single bat allows USB charging to be added for a few bucks and a single battery is intrinsically safer. In the end, the mod designer makes the call thats right for him.
Space, efficiency, aesthetics, safety features, ergonomics, build quality, cost-effectiveness, etc are all important points to keep myself aware of, but I guess there's a balancing act at play with these things when considering which batts have to be used. I'm considering a battery pack design that's small enough to keep things tight and not too heavy, but with enough mAh to make it an all-day vape. Those 10440 batts look promising, but the mAh is rather low. Again, weighing the differences. It's a constant search to nail down all of the "Goldilocks" zones in these mods.
If only they could make a 16340 with 3600 mAh and in 4.5 volts. Well I can dream, and then go back and decide what to trade off. When designing anything, the engineering requires trade offs that someone won't like.
I would be happy if they made a 18650 that was 3600mah. I mean a true 3600mah i know they sell 3600 and 3800mah ones on ebay that are really 2600mah . Who ever the guy in china is that rates batteries needs to lay off the sause.
I remember reading the production schedule for Panasonic last year and for the next 3 years the capacity for the 18650 was predicted to end up at 3400 mah so it's pretty close to what you're looking for. Just a matter of time 
Panosonic made some 3100mah for a little while but i guess there must have been trouble with them you cant find them anymore. Lots of 2900mah Panasonic's out there and a true mah rating. I might just pick of a case of them
I grabbed 40 or so of them about 8 months ago and they are still my battery of choice. Really well made and the performance is excellent. The guy on ebay that sells them (for those that don't require the added protection PCB) is open to bulk sale prices.
I'm using them in the Provari now with a dab of solder on the positive terminal. I burn through 6 ml of juice a day and have never had one run out on me.
I'm using them in the Provari now with a dab of solder on the positive terminal. I burn through 6 ml of juice a day and have never had one run out on me.
Panosonic made some 3100mah for a little while but i guess there must have been trouble with them you cant find them anymore. Lots of 2900mah Panasonic's out there and a true mah rating. I might just pick of a case of them
Redilast is a fairly new company they have protected 18650 2900 mah panosonics in them. They are not cheap about the same price as AW's. They also use a japan made protection circuit in them. Personally i think they are worth the extra cash.
The Bright Side • View topic - RediLast 2900, AW 2900, AW 2600 Battery Unwrapping
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The Bright Side • View topic - RediLast 2900, AW 2900, AW 2600 Battery Unwrapping
Welcome to the Frontpage
The protected circuit is a pain in the .... because it makes the AA size batts too long to fit into standard AA holders.
IMR are liMH chemistry. They are considered to be safer Unlike the li Ion(LiCoO2) most use, that need a PCB ( protection circuit ) to make them safe. Downside to them is they are only half the MAh of li ion's (LiCoO2) for the same size cells.
Edit: Cant find a valid source that confirms the liMH dont need protection. I know lots of folks use the liMH batteries and say they dont need protection. But everything on line says they should have a protection circuit. So maybe they are not as safe as i thought they were. Does anyone have a source of info on these liMH saying they dont need protection ?
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Good catch Java, I'd be interested to know as well. The term "Safer" can be stretched for miles and can often be VERY deceiving. "Safest" is a more consumer confident term to use. That, I am sure, no one is willing to "commit" to saying....
Safer means that they won't explode or catch fire. They can still discharge a LOT of current if shorted and destroy any unprotected circuit they are connected to but it removes the worst of the dangers.
Seems like they are considered a safe chemistry battery, But if used unprotected it is up to the user to make sure they dont discharge lower then 2 volts also overcharge too far past 4.2. So they wont vent hot gas like the lithium cobalt batteries but you still need to keep an eye on them if you want them to last.
Battery space says this about them
New Generation Li-Ion Battery (Li-Mn-Ni-Co ) -Higher Energy density than LiFeP cell , safer operation than LiCo battery and lower cost than any cell
LiMnNi battery must be cut-off at <=4.2V/cell condition when charging and >= 2.0V when discharging
Must use PCM to protect battery when building a battery pack
Here is what lighthound says
Safe chemistry LiMN 3.7V rechargeable battery is now available in 18650 size. These cells can handle high amperage and is safe to use in series / multi-cell applications. Can be charge with any LiIon battery charger with 4.2V output.
Specifications:
Nominal Voltage : 3.7V
Capacity : 1600mAH
Lowest Discharge Voltage : 2.50V
Standard Charge : CC/CV ( max. charging rate 4.5A )
Cycle Life : > 500 cycles
Max. continuous discharge rate : 10C
Caution:
- Do not over-discharge/overcharge
- Recharge empty batteries ( resting voltage ~3.6V ) as soon as possible. Leaving LiIon batteries in discharged state will incur irreversible damage ( capacity / cycle loss )
- Do not short circuit ( will release tremendous current )
- Do not dispose of in fire.
Battery space says this about them
New Generation Li-Ion Battery (Li-Mn-Ni-Co ) -Higher Energy density than LiFeP cell , safer operation than LiCo battery and lower cost than any cell
LiMnNi battery must be cut-off at <=4.2V/cell condition when charging and >= 2.0V when discharging
Must use PCM to protect battery when building a battery pack
Here is what lighthound says
Safe chemistry LiMN 3.7V rechargeable battery is now available in 18650 size. These cells can handle high amperage and is safe to use in series / multi-cell applications. Can be charge with any LiIon battery charger with 4.2V output.
Specifications:
Nominal Voltage : 3.7V
Capacity : 1600mAH
Lowest Discharge Voltage : 2.50V
Standard Charge : CC/CV ( max. charging rate 4.5A )
Cycle Life : > 500 cycles
Max. continuous discharge rate : 10C
Caution:
- Do not over-discharge/overcharge
- Recharge empty batteries ( resting voltage ~3.6V ) as soon as possible. Leaving LiIon batteries in discharged state will incur irreversible damage ( capacity / cycle loss )
- Do not short circuit ( will release tremendous current )
- Do not dispose of in fire.
Ok, they're safier indeed Still, the problem of discharging exists: you can destroy it permanently (although the cell itself, not you).
Still, the problem of discharging exists: you can destroy it permanently (although the cell itself, not you).
ummm safier... I see another colbert fan out there. And that statement is full of truthiness.
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