First Li-Ion Battery Mod

[TomCatt]

I've made a few Puck-style mods, with Ni-MH batteries; but this is my first mod with li-ion.

Components:

- Altoids tin - Peppermint (hey, DIY peppermint is my all-day-vape )
- Adjustable voltage boost module - LM2577S DC-DC 4-35V Adjustable Step-up Power Supply Non-isolated Boost Module 3A | eBay
- Radioshack 3A switch - Mini SPDT 3-Amp Push On/Push Off Switch - RadioShack.com
- 1 18650 battery holder - Plastic Battery Storage Case Box Holder for 1 x 18650 Black with 6" Wire Leads | eBay
- 510 atty connector from MadVapes
- 3M epoxy / plumbers epoxy putty

Kapton tape


I lined the bottom and sides of the Altoids tin with Kapton tape to reduce the possibility of shorts (I'm sloppy, gotta go a little bit extra on the safety ). Put a layer of 3M epoxy down where I was putting the switch to raise the switch off the bottom of the tin. Also did this to test the adhesion of the epoxy to the Kapton tape, adheres pretty well. Then put the switch in:



Individual components:



Placed the parts to see how they fit:



Added the atty connector and used the plumbers putty to secure. Made a hole for the pot screw through the bottom of the tin, added a couple dollops of 3M epoxy to set the caps into and placed the boost module in:



The pot adjustment screw:



3M epoxied the batt holder in, connected everything together:




I set the voltage to 4.7, added my Cheapo Gummy Tank with DIY peppermint and ..... VAPED!


I'll update y'all on battery life after using for a few days.

[Stosh]

Nice, compact, neat, simple......ummm missing the circuit diagram..

I like it, but have destroyed 2 Altoids tins trying to drill for the atty connector...
and I'd rather vape my mints these days.

[TomCatt]

To make the holes for the atty connector and switch, I just took a push pin and made a starter hole. Then got a smaller screw driver to enlarge the hole and used larger screw drivers (or whatever else was lying around ) until the hole was big enough. Plus, the 'pushed in' edges gave a bit more support than a clean-cut hole.

I was going to use the Altoids tin for a Puck; but then I got a couple of 18650s and it fit soooo nicely in there

[WillyB]

Looks decent. The switch you linked to is not a momentary, was the link correct?

Just so folks know those eBay 18650 battery holders are too short for protected cells, assuming they are like the similar ones I got.

http://www.ebay.com/itm/1-Battery-Bo...item2a151331e3

[TomCatt]

Looks decent. The switch you linked to is not a momentary, was the link correct?

Just so folks know those eBay 18650 battery holders are too short for protected cells.

Link to the RS switch may be incorrect, just glanced through and picked what looked like the one I had. I'll check the part number and fix/repost the correct link.

[breaktru]

Very nice TomCatt.
and there is plenty of room for some mints too

[AzPlumber]

Nice job TomCatt, I haven't done one of these but always wondered if those little tins get hot if you hit on them very hard?

Two part epoxy putty is awesome stuff, but i wish they wouldn't call it Plumbers Epoxy Putty I've used it on Mods, to repair a chair, fix a cup handle, to mount Deer or Elk Antlers but I have never used it to repair plumbing. It should be called "Instead Of A Plumber Epoxy Putty".

[asdaq]

Nice box TomCatt, I'm also a fan of the putty. Here we have Poxilina which does sound better. I took my daughter and her cousin to Home Depot on a mission to look for "epoxy putty" and "knurled nuts" and they had a riot.

[lynch]

Looks decent. The switch you linked to is not a momentary, was the link correct?

Just so folks know those eBay 18650 battery holders are too short for protected cells, assuming they are like the similar ones I got.

1 Battery Box Holder Case 1 x 18650 with 6'' Leads | eBay

WillyB, I brought from 2 different sellers and there both short and one order was for a 10 pack of them .
Rather than toss them I cut the end off the -neg and super glued it to end of case and moved the remaining part up a little to fit good then with small screw attach it to case. It's a PITA but better than tossing or chewing up my bats.

[TomCatt]

Looks decent. The switch you linked to is not a momentary, was the link correct?

Just so folks know those eBay 18650 battery holders are too short for protected cells, assuming they are like the similar ones I got.

http://www.ebay.com/itm/1-Battery-Bo...item2a151331e3

Can't find the switch on RS website, but here is the actual switch used; which was purchased at my local RS:

http://www.sci.com.tw/PRODUCTS/switc...TCH/R13-24.htm


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