Would this work as a mod?
- Thread starter Artisticnails07
- Start date
- th_trl_thread_readers 0
- Status
Nope, almost all of those 'battery power bank ultra 9000 phone charger galore!' chicom units are a lipo battery, a buck-boost dc-dc converter, and a linear voltage regulator.
3.7-4.2v single lion/lipo battery gets boosted to ~7.2v, then a linear voltage regulator (7805) brings the voltage down to 5v at around 1A (being EXTREMELY generous). They never have a heatsink on the regulator, and they're very inefficient in comparison to higher end switch-mode power regulators. 7805 is rated at 1A, although it's with a large heatsink and some air flow. Neither of which are in ANY unit I've seen so far, and I've seen a few.
Most of these mods that people run pull way more than 1A. Figure an un-regulated mechanical mod running an 18340 to 18650 single cell lipo battery.
Let's assume fully charged at 4.2v. With a 2.8 ohm atomizer coil, it's pushing 1.5A to the coil, for around ~6.5 watts. If you're running a 1.8 ohm atomizer coil, you're pulling 2.3A for ~10 (9.8) watts. As soon as you'd hit the button it would just fail to output power and turn off the output. Or it could simply just output 1A for a few seconds which wouldn't get the coil hot enough for much vapor.
However, most of the cells they use are factory rejects. That means the maH values for the battery capacity, as well as their 'C' rating, that is, how much power output in current vs the batteries capacity it can output. 1 'C' for a 5000mah battery is 5000mah (5A). However, disingenuous marketing due to no oversight lets chicom manufacturers label products arbitrarily. I sure as hell wouldn't want to pull anywhere close to 5A from that thing. I'd be weary of 500ma (.5A).
If you want something like that, I've made a few. However I used high end stuff because I wanted a product that would last years, be trouble and maintenance free, and be able to output as much current as I'd need.
For my setup I purchased (well, I made a few setups for friends/family as well)
5000maH Lipo cells rated at 100C burst (30 seconds) and 50C continuous. Yes, a single cell can output 250A continuously.
Dimension Engineering 3A boost regulator as well as their LVBoost converter. Their big booster is $50 or so, their smaller one $20. You can get a cheaper switch-mode that only does voltage reducing cheaper (i.e. using 2 lipo batteries).
My personal unit is 2 lipo batteries and their 3A unit. It's great, it serves multiple functions. From charging USB devices (3 at a time!) to powering microcontrollers / breadboard projects, to charging them. I have a small multi-function charger on-board so I can charge anything from lead acid to nimh to nicd to lipo etc. I have a switch where I can change the output voltage down from .5v up to 24v. Great part is since I have 2x 5kmah batteries, I have lots of power to play with. It charges in under 30 minutes (batteries are rated for 2c charge rate). All tucked away nicely in a Pelican 1040 case with waterproof connectors and goodies.
It's one of my greatest gadgets I've made. It's saved the day more times than I can count. If used just to charge phones, it can charge my gnex extended battery around 9 times before cutoff. Maybe another 50% of the 10th charge. That alone makes it great but I spent some change on it too.
3.7-4.2v single lion/lipo battery gets boosted to ~7.2v, then a linear voltage regulator (7805) brings the voltage down to 5v at around 1A (being EXTREMELY generous). They never have a heatsink on the regulator, and they're very inefficient in comparison to higher end switch-mode power regulators. 7805 is rated at 1A, although it's with a large heatsink and some air flow. Neither of which are in ANY unit I've seen so far, and I've seen a few.
Most of these mods that people run pull way more than 1A. Figure an un-regulated mechanical mod running an 18340 to 18650 single cell lipo battery.
Let's assume fully charged at 4.2v. With a 2.8 ohm atomizer coil, it's pushing 1.5A to the coil, for around ~6.5 watts. If you're running a 1.8 ohm atomizer coil, you're pulling 2.3A for ~10 (9.8) watts. As soon as you'd hit the button it would just fail to output power and turn off the output. Or it could simply just output 1A for a few seconds which wouldn't get the coil hot enough for much vapor.
However, most of the cells they use are factory rejects. That means the maH values for the battery capacity, as well as their 'C' rating, that is, how much power output in current vs the batteries capacity it can output. 1 'C' for a 5000mah battery is 5000mah (5A). However, disingenuous marketing due to no oversight lets chicom manufacturers label products arbitrarily. I sure as hell wouldn't want to pull anywhere close to 5A from that thing. I'd be weary of 500ma (.5A).
If you want something like that, I've made a few. However I used high end stuff because I wanted a product that would last years, be trouble and maintenance free, and be able to output as much current as I'd need.
For my setup I purchased (well, I made a few setups for friends/family as well)
5000maH Lipo cells rated at 100C burst (30 seconds) and 50C continuous. Yes, a single cell can output 250A continuously.
Dimension Engineering 3A boost regulator as well as their LVBoost converter. Their big booster is $50 or so, their smaller one $20. You can get a cheaper switch-mode that only does voltage reducing cheaper (i.e. using 2 lipo batteries).
My personal unit is 2 lipo batteries and their 3A unit. It's great, it serves multiple functions. From charging USB devices (3 at a time!) to powering microcontrollers / breadboard projects, to charging them. I have a small multi-function charger on-board so I can charge anything from lead acid to nimh to nicd to lipo etc. I have a switch where I can change the output voltage down from .5v up to 24v. Great part is since I have 2x 5kmah batteries, I have lots of power to play with. It charges in under 30 minutes (batteries are rated for 2c charge rate). All tucked away nicely in a Pelican 1040 case with waterproof connectors and goodies.
It's one of my greatest gadgets I've made. It's saved the day more times than I can count. If used just to charge phones, it can charge my gnex extended battery around 9 times before cutoff. Maybe another 50% of the 10th charge. That alone makes it great but I spent some change on it too.
Except if youd bothered to read the highly technical and knowledgeable post above youd see it wont work.
No worries mate, just didnt want someone reading your reply and not knowing that and spending money on a device that wont work for em. 
However, if the passthrough had an internal battery, it would work, just as long you don't vape too quickly. Not something I'd want to actually try.
- Status
Similar threads
