World's Smallest Lithium Ion charger w/ built in Volt display

[ericdjobs]

--> FS: Cottonpickers Chargers incl. Worlds smallest Li-ion charger with display

Saw this on Candlepowered's marketplace... wow! So awesome... I'm seriously considering picking one up and carrying it around with me instead of my multimeter. Very awesome idea... the guy makes Solar Powered lithium ion chargers as well.. sweet!

 

[NicksVap3]

that is pretty sweet... but $50 for probably $5-10 in parts is a lil steep

 

[VpnDrgn]

Yeah, $50 bucks for a handmade item to replace a $15 mnf item is a little steep.

 

[raceengine]

for that price I will get pila chargers anytime... IMHO best charger around

 

[ericdjobs]

Yeah, $50 bucks for a handmade item to replace a $15 mnf item is a little steep.

Yeah I agree completely, I was just enamored by it.. after the neato factor it is pretty high priced..

I was looking at Hobby King and you can score a pretty decent hobby charger for around $17-$25 but I was looking for something more..portable I guess. Getting tired of carrying around my multimeter haha.

 

[Rockproof]

eric,

Go on mad vapes web site and browse around. They sell a meter that screws right into your mod. $14 I think. Looks like it uses the same LED display...

 

[ericdjobs]

eric,

Go on Mad Vapes web site and browse around. They sell a meter that screws right into your mod. $14 I think. Looks like it uses the same LED display...

I just ended up buying a cheap voltage meter from ebay and i'm going to solder it into a battery box.. i just need something for testing battery voltages while I'm on the go.

 

[VpnDrgn]

Like rockproof said, this voltage meter from Madvapes
is very small and screws right in to whatever you are using without having to take out the batt.
Then just hit the button on your PV and you see exactly how many volts your batt is putting out.

 

[jonny2hottie]

cool idea but i'll stick to my pila and my provari

 

[ericdjobs]

Like rockproof said, this voltage meter from Madvapes
is very small and screws right in to whatever you are using without having to take out the batt.
Then just hit the button on your PV and you see exactly how many volts your batt is putting out.

I have a regulated mod (evercool) so I can't use one of those, found my solution though... $2 volt meter from ebay, 2xAA battery box.. just waiting for china parts lol

 

[VpnDrgn]

Evercool is a switching regulator isn't it? Should work with this I think, just so you know.
It's linear and PWM that it has problems with.

 

[Chip_]

Evercool is a switching regulator isn't it? Should work with this I think, just so you know.
It's linear and PWM that it has problems with.

Madvapes says that these little meters might not work with mods that use switching regulators.

I propose that, since, Switching Regs tend to be very noisy, and that whenever I use the darn things in the real world, I always have to add extra inductors and capacitors for filtering, otherwise, the noise just drives ya crazy.

Although I haven't tried these switching regs with these little battery mods (and I won't) I still suspect it is the noise spectrum that interferes with these little displays. Probably end up with some inacurrate results. Very easily you could be off by 50 100 mv or so, which would give you false indications on the state of your battery charge.

 

[VpnDrgn]

Ok...hmmm... .... It first says that they may not work with linear or pulse modulated regulators.
I didn't read on a couple of sentences, where it then says it may not work with switching regulators!

What does that leave? Is there any other type of regulator? This is kinda like when the DC cartos came
out. In the first part of description it said not to use with one type of PV, then said not to use with
another type in the end of description, pretty much eliminating all but HV PV's. WTH

Of course, now, every body uses them with every thing, or tries to anyways.

I am prrreeety sure VV mods wouldn't be very popular if they where very noisy. Some regs can scream if
you push them beyond their spes, but wouldn't you. Maybe your "real world" contains a motor?
That would make for a lot of electrical noise ( hum ) if I remember from my few dealings with amps
and cars.

 

[Rockproof]

The MV meter works fine with my ORK-T switching regulator. Tested against the results with a multimeter, it's spot on...If memory serves me, I've also used the meter on an Evercool and it worked fine.

 

[breaktru]

The meter WILL work with switching an Linear Regs. NOT with PWM

 

[Jetmec]

Works just fine on my Evercool VV and on my MadVapes VV. Will not work on eGo Batts.

 

[breaktru]

The ego battery is around 3.2v and the meter specs say around: 3.7V to22.2V
So with that in mind, using the variable voltage below 3.7v is not recommended. If I remember correctly, around 3.5v the meter DIMs being starved for more voltage.

 

[rj1]

That charger looks ok but looks like it would break pretty easy! 50 dollars is a lil steep...

 

[Chip_]

I am prrreeety sure VV mods wouldn't be very popular if they where very noisy. Some regs can scream if
you push them beyond their spes, but wouldn't you. Maybe your "real world" contains a motor?
That would make for a lot of electrical noise ( hum ) if I remember from my few dealings with amps
and cars.

I doubt that anyone would even notice, the noise specturm, with DC VOLT meters. You wouldn't know it, unless you put an Oscope on it. The noise comes from the Switching Regulators generating their own Frequency. This is how swtiching regulators work. They have to generate pulses to charge the inductor and capacitor to get the desired voltage out.

So the noise doesn't come from motors, it comes from the switching regulator itself. The only way to know what is really happening, is to put an Oscope on it and check it out.

But, for most of VV mods, I doubt that it is necessary to do this. It is only necessary if you are trying to get absolute accuracy on your measurements.

 

[WillyB]

Yeah I agree completely, I was just enamored by it.. after the neato factor it is pretty high priced..

I was looking at Hobby King and you can score a pretty decent hobby charger for around $17-$25 but I was looking for something more..portable I guess. Getting tired of carrying around my multimeter haha.

It's a nice item, and actually has many more features/options than the Pila.