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DIY 18650 Flat Top Battery Holder

RicModMaker

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Oct 29, 2013
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I've been wanting to do this for a while and think the bought ones can be either too big, or the wires are too thin. That and I'm impatient and can't stand waiting for the slow boat from China to come in!

So here it is, my DIY battery holder made by using a tin can lid, a chinese takeaway box lid and a few basic tools.

IMG-20140402-00502.jpg


First cut off the lip of the plastic lid so you've got a flat surface to work on.
Then cut 2 sides of it so it's neat and square.
Then mark on the lines using the dimensions in the drawing onto the tin lid and plastic lid.
You'll notice I've done it twice on the tin lid as you'll need one for each end.

battery-holder.jpg IMG-20140402-00505.jpgIMG-20140402-00504.jpg

Then use an old biro and scribe the plastic lines against a ruler.
About 5 hard passes is enough to weaken the plastic a little so it'll fold nicely.
Then cut the plastic and cut 2 x 10mm slits for the connectors to poke through.
It should look like this.

IMG-20140402-00509.jpg

Then fold the flaps inside and use some insulation tape to secure it in place.
Remember to poke your knife through the slits afterwards.

IMG-20140402-00510.jpg

Then take your tin lid, a piece of soft wood like pine, a dowel and a hammer.
I used the pliers to hold the dowel so I didn't bash my fingers.
Place the tin lid on the piece of wood, line up the dowel and bash it a few times until the bulge a sticking out a few millimeters.

IMG-20140402-00507.jpg

Once this is done, cut it out using the tin snips.

IMG-20140402-00508.jpg

Then poke them through the slits in the holder and fold them. I added an extra 5mm fold to the end before the main fold so it'll be easy to insert a wire before soldering.

IMG-20140402-00511.jpg

Job done.

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Remember to use some more insulation tape once you've soldered the wires onto the connectors.
 
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That is brilliant Seedy, very ingenious :D

And you could extend the box a little and make the tin connectors a Z shape and have the 'spring' for venting or different size batteries ;)
18650.jpg
 
There is an amount of spring already as the box is quite flexible. The only problem I see with doing it with a z shape spring is the tin isn't that springy. Food for thought though.
 


That was my solution, I've got a pile of these 18650 cases and some inevitably come pre broken ready for use. All it needs is epoxy resin to hokd the copper in place, the lid will need slitting for the wire then it becomes an insulated battery for a tin mod.
 


That was my solution, I've got a pile of these 18650 cases and some inevitably come pre broken ready for use. All it needs is epoxy resin to hokd the copper in place, the lid will need slitting for the wire then it becomes an insulated battery for a tin mod.

Good work fella. I like.
 
Great job, just make doubly sure to not cut your finger horribly on a tin can lid
 
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