Almost a mod in a box

[Bdbodger]

I seen this battery box/charger/portable power box on ebay . It holds 4 18650 batteries and has two charging inputs . It output 5v 1.5A (MAX 2A) portable power via a usb connection . I just thought hmm that almost a mod if you could change the usb output .

http://cgi.ebay.ca/5V-Mobile-Power-...683?pt=LH_DefaultDomain_0&hash=item4cf7c5b0bb

Use four 18650 2600MAH battery,Capacity up to 10000MAH

 

[borockster]

Ordered 2 just to check them out. Thanks!

 

[Dalton63841]

Turn one into a mod, and use the other for a mobile power box for a usb passthrough! 5v, 2a max, this box is perfect for that...

 

[Bdbodger]

I was thinking that myself it would work for a passthrough battery . 10000mAH + the 650mAH of a fresh passthough you wouldn't need a recharge for a week . Or at least bring a ego charger with you minus the wall adaptor . The wall adaptor puts out about 550ma at 5v so I assume it would be ok .

 

[WillyB]

Actually there's a lot of cool stuff there for $12. Nice beefy looking looking batt springs too.

Looks to also have an efficient switching reg in there (note the inductor).

Looks a lot like these that I have.

 

[bstedh]

Just replace the rocker switch with a Momentary and make a usb to 510 adapter and you are set...

 

[Bdbodger]

Seems a bit large to be holding up to your face to vape from I think a good idea would be to put a belt clip on the back of it and use a passthrough or just use it as a portable charger . I will see I decided to order a couple myself to see what thier like .

 

[CraigHB]

Nice find, amazing price too.

 

[Bdbodger]

From what I see and read the batteries are used in parrellel and it uses a boost circuit .

Blue LED will light when charging to the load. Flashes during charging, Not the same flicker frequency of different loads, it means that the boost circuit is working. (Some models Always lights).

USB output to charge MP3 mobile phones, etc.

My phone is always getting low on power I don't check it enough and I can use it for my Ipod and ecig . Sounds good to me . Maybe a usb to 510 battery adapter too .

 

[NicksVap3]

put a clip on it, clip it to your belt loop. put a clip on a PT and clip it to your shirt collar

good find, im sure we will see this in use soon

 

[VapeSoniq]

Shut up and take my money.

 

[Bdbodger]

Well the two 18650 battery boxes/portable chargers finally got here today . I like . Here are some pictures with 4 18650 protected batteries .

 

[perlionsmitnick]

Now all you need is an "El ......" to go with it.

That's awesome

 

[ericdjobs]

That thing is freaking sweet.... and just last night too I was looking at some US battery suppliers and I found one that was selling a pack of 4 protected trustfire 18650s for $21... ....... wish I could find the link again

Looking at another sale on ebay for the sale item, looks like it uses a "Max Efficiency: 95%( High-efficiency synchronous-rectified buck control IC )"
It has built in over-charge, over-discharge, over-amp protection for the batteries.. so it says.. says the protection trips at a 2A draw, which means 2.5ohms would be your upper limit on a 5V device.. wouldn't try dual coils.

I don't know why the protection circuit trips at 2A though, with 4x 18650 in parallel you certainly should be able to sustain a higher discharge rate than that though, right? Or am I totally off base?


I think this was it, but now it's saying $23... still not a bad deal, about $6

no dealextreme that's for sure.. but it does ship from the USA

http://www.vendio.com/stores/lightspeed360/item/lid=3407534

 

[BiancaMontgomery]

Can you charge this via the box, or do you have to take the batts out and re-charge them?

 

[ericdjobs]

Can you charge this via the box, or do you have to take the batts out and re-charge them?

The box has built-in charging, says it needs DC input of 9v-10v ( I have SO MANY DC wall-warts with an output voltage of 9v!)

Specification:
Input Voltage: DC 9 ~ 10 V
Output Voltage: 5.2V, Load: 5V
Rated Input Current: 2A, 1A ( Min )
Output Current: 2A ( More than 2A , circuit automatically protected )
Max Efficiency: 95%( High-efficiency synchronous-rectified buck control IC )
Output Short-circuit Protection : Yes
Input over-voltage Protection : Yes
Battery low voltage Protection: 2.8V
Size: 115 x 82 x 23 mm ( L*W*H )
Weight: 80g

Looks like it has built in protection as well.

 

[BiancaMontgomery]

Well...this thing is freakin' awesome!

 

[Technonut]

If I'm reading the specs correctly, the amp output is regulated...

Output current: 1.5A (MAX 2A)

Considering @ 3.7V a 1.5 ohm Low Resistance atty requires a little more than 2.5 amps, I would be interested to know if the protection circuit in the box would trip?


EDIT: It is a pretty low max amp output given the capacity of the box.. Just a matter of checking the atty ohms before maxing out 1.5-2.0 amps..

 

[ericdjobs]

If I'm reading the specs correctly, the amp output is regulated...



Considering @ 3.7V a 1.5 ohm Low Resistance atty requires a little more than 2.5 amps, I would be interested to know if the protection circuit in the box would trip?

That's the only problem i'm seeing with this thing

Output Current: 2A ( More than 2A , circuit automatically protected )

It looks ike the built in protection circuit trips at 2A draw.. which isn't all that much for 4x18650 in parallel

2.5 ohm at 5v is a 2A draw

I don't quite understand why they decided to use a protection circuit that trips at 2A with 4x18650 in parallel config... it should be able to push way more current than that. Maybe they used a protection circuit out of a battery/same stock as batteries... 2500mAh 1.5C discharge rate so let's be conservative and say 2000mah.. so max discharge rate of a single 18650 is 2.5A. In a parallel config, it splits the current draw between the batteries, so when you trip the protection circuit on this thing you're only using 500mAh current from each battery... that's nothing for an 18650!

This is still an EXCELLENT find. It's perfect for charging sit'n'go passthroughs, joye 510s, anything!
This would make a much better "PCC"(not a case though) for let's say a joyetech 510... all those people who MUST have a cigarette-shaped e-cig could use this and a 510 to great effect...... this would let you be away from a USB/Mains plug for quite awhile.

Overall excellent find IMO

 

[WillyB]

That thing is freaking sweet....

Looking at another sale on ebay for the sale item, looks like it uses a "Max Efficiency: 95%( High-efficiency synchronous-rectified buck control IC )"
It has built in over-charge, over-discharge, over-amp protection for the batteries.. so it says.. says the protection trips at a 2A draw, which means 2.5ohms would be your upper limit on a 5V device.. wouldn't try dual coils.

I don't know why the protection circuit trips at 2A though, with 4x 18650 in parallel you certainly should be able to sustain a higher discharge rate than that though, right? Or am I totally off base?

You are confusing me. Are you talking about the same unit that Bdbodger is showing? Do you have one?

One cell can sustain over 2A. Why would there be a need for a higher than 2A output with a USB output? When USB (and the associated hardware) was developed they were basically looking at 100 and 500mA of current.

According to Wikipedia.

... as much current as the connector will safely handle when no communication is taking place; USB 2.0 standard-A connectors are rated at 1.5 A by default.

Devices that need more than 2A usually use the more traditional DC connectors for input, the same ones you see on large power supplies.