9V Battery Protective Cap

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MakerCameron

Hobby & DIY>Electronics

IP Report

Print Profile(3)

All

X1 Carbon

H2S

H2C

A1 mini

P2S

H2D

X1E

P1P

P1S

H2D Pro

X2D

A2L

0.16mm layer, 2 walls, 15% infill

Designer

12 min

1 plate

4.8(24)

0.2mm layer, 3 walls, 15% infill

13 min

1 plate

4.8(16)

0.2mm layer, 2 walls, 15% infill

20 min

1 plate

5.0(1)

Open in Bambu Studio

Boost

155

397

299

Released

Description

What is the purpose of this model?

This is a protective terminal cap for use on standard 9V batteries. Some benefits include:

Protects 9V batteries when not in use
Shields the battery contacts, reducing the risk of a short circuit
Protects battery contacts from damage due to dust, dirt and contamination
Prevents unwanted electrical discharges

For the city where I live, when we recycle batteries, we are asked to put electrical tape over the terminals before putting them in a zip lock bag so they don't short circuit. At less than a gram of plastic each, I just print these instead of using tape.

I designed these to use as little filament as possible but still do the job. You could clone a bunch and print a whole build plate full without using much filament.

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Fitment Note

Despite there being a “standard” for terminal sizes and spacing, there is just enough +/- in the spec standard (and printer tolerances) that the caps fit some brands of 9V batteries slightly better than others. This has been tested on many brands, however and should work well enough.

If for your printer and battery brand is one of the rare combinations where it is too tight, scale up the model by 1% for PLA/PETG or consider TPU. This model should work as-is for 99% of you with no modifications in whatever material you want to use.

Comment & Rating (52)

@rbarthen

Print Profile

0.16mm layer, 2 walls, 15% infill

Nice simple safety cap.

The profile uploader has replied

@MakerCameron

Thanks for the kind words and the cool make photo

(Edited)

@maxv

Boosted

Print Profile

0.16mm layer, 2 walls, 15% infill

Nice design, great idea.

The profile uploader has replied

@MakerCameron

Thanks! I saw a company that sells something very similar, but the minimum order quantity was too many so I decided to model my own :-). Glad others are finding it useful.

@GuillaumeB

Print Profile

0.16mm layer, 2 walls, 15% infill

Work perfectly, fast and easy to print and use.

The profile uploader has replied

@MakerCameron

Thanks! I like that photo and the bokeh / portrait effect with the second cap in the background. Good picture!

@RetroStuff

Print Profile

0.16mm layer, 2 walls, 15% infill

I printed it in PLA and it turned out perfect

Show original

@user_2002611104

Boosted

I printed these in PLA. They fit quite tight but when I went to remove them, both tabs broke, so I had one piece of PLA stuck inside one terminal and a ring stuck over the other. I was able to remove them with a small screwdriver. I then printed them in TPU and this time they worked great. They still fit tight but at least the tabs don't break off.

The designer has replied

@MakerCameron

This is the first I've heard of them coming out so tight! Myself and many others have printed and used these successfully in PLA. I did mention that there is a decent amount of tolerance in the "spec" for these terminals so the size can vary (slightly, but still) between brands. And then add in variability for printers and different rate of shrinkage for different filaments...I could see where there might be a perfect storm! For you, I'd probably suggest scaling it (PLA) up to 102%

@chilluniverse

Print Profile

0.16mm layer, 2 walls, 15% infill

Prints just fine.

The profile uploader has replied

@MakerCameron

Thanks for posting the first make of my model here on MakerWorld! Appreciate it.

@tutrboduke

Print Profile

0.2mm layer, 3 walls, 15% infill

It printed well.

@slb609

Print Profile

0.16mm layer, 2 walls, 15% infill

I love these - I have a bunch printed, and I can now stick a battery in my pocket without fear that I'll absentmindedly stick my keys in too. I've burnt through my jeans pockets with this when I hadn't noticed - nearly came through the front of my jeans!!

The profile uploader has replied

@MakerCameron

I thought at first you were telling a joke with the jean pockets - but I see now that was legit! That must have been both a sight and an ordeal! Can't say I considered your use case, but glad that it seems to be working for you! Stay safe.

@Sir_M_Scribbles

Print Profile

0.2mm layer, 2 walls, 15% infill

I've always considered making these then finally searched and behold! Here they are. Print was perfect and haven't had an issue with removal/breaking in my own experience.

@MakerCameron

Thanks. Glad you liked it.

@Ridokilos

Print Profile

0.16mm layer, 2 walls, 15% infill

Nothing spookier than having a bunch of 9v around threatening to short against something and start a house fire. Sure, I could have just taped the terminals for a cheaper solution, but having a brightly colored cap for additional peace of mind is nice.

The profile uploader has replied