LilyPad Coin Cell Battery Holder - Switched - 20mm

Sure, your flashing, chip-tune playing T-shirt is really cool at the party... but at some point you need to turn it off. And yes, you could just pull the battery, or maybe you've even sewn a LilyPad slide switch in-line. Wouldn't it be nice if there was just a switch *on *the battery? Well, look no further.

This LilyPad Coin Cell Battery Holder has a small slide switch installed on the board, in-line with the power so you can shut off your project and save batteries. This slide switch is the same as on the LilyPad Slide Switch Board, so it's not easy to accidentally turn off or on.

Just like the original Coin Cell Battery Holder, this simple board holds a 20mm coin cell battery (such as a CR2032) and gives you four connection points (two positive and two negative) for sewing into your project. Additionally, we have strengthened the battery connector on this board in order to ensure that it doesn't accidentally pop off.

Note: A portion of this sale is given back to Dr. Leah Buechley for continued development and education of e-textiles.

LilyPad Coin Cell Battery Holder - Switched - 20mm Product Help and Resources

Night Sky Halloween Costume

October 25, 2017

Make a beautiful night sky costume using the LilyPad LEDs and the LilyTiny.

LDK Experiment 5: Make Your Own Switch

October 2, 2013

Learn to create and integrate your own handmade switch into an e-textile circuit.

LilyPad Simple Power Hookup Guide

January 15, 2015

A basic guide for getting started using the LilyPad Simple Power with LiPo batteries.

Powering LilyPad LED Projects

December 17, 2016

Learn how to calculate how many LEDs your LilyPad project can power and how long it will last.

Light-Up Plush

December 16, 2016

Craft a light-up plush with LilyPad LEDs controlled by pressing a button and sliding a switch in the creature's hands.

Light Up Pennant with E-Textiles

September 17, 2015

Show your school spirit, geek pride, or fandom with a light up pennant using the LilyTwinkle or LilyPad Arduino.

Illuminated Mask

December 16, 2016

Use LilyPad LEDs, a switched battery holder, and coin cell battery to make a fun light up mask for your next costume party.

Glowing Pin

December 16, 2016

Create a quick and easy piece of e-textile art using a LilyPad LED, battery holder, conductive thread, and coin cell battery.

LilyPad Tri-Color LED Hookup Guide

April 20, 2018

Learn how to hook up the LilyPad Tri-Color LED and use a common anode RGB LED in e-textile projects.

Twinkle Zodiac Constellation

August 15, 2017

Create a quick and easy piece of e-textile art based on a Zodiac sign using a LilyTiny, LilyPad LEDs, battery holder, conductive thread, and coin cell battery.

LilyPad RGB LED Hookup Guide

July 18, 2019

Learn how to hook up the LilyPad RGB LED and use a common cathode RGB LED in e-textile projects.

LilyPad Basics: Powering Your Project

September 24, 2018

Learn the options for powering your LilyPad projects, LiPo battery safety and care, and how to calculate and consider power constraints on your projects.

Core Skill: DIY

Whether it's for assembling a kit, hacking an enclosure, or creating your own parts; the DIY skill is all about knowing how to use tools and the techniques associated with them.


Skill Level: Rookie - Basic hand tools are required and instructions will allow more freedom. You may need to make your own decisions on design. If sewing is required, it will be free-form.
See all skill levels

Core Skill: Electrical Prototyping

If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.

2 Electrical Prototyping

Skill Level: Rookie - You may be required to know a bit more about the component, such as orientation, or how to hook it up, in addition to power requirements. You will need to understand polarized components.
See all skill levels


Looking for answers to technical questions?

We welcome your comments and suggestions below. However, if you are looking for solutions to technical questions please see our Technical Assistance page.

  • Member #1364955 / about 6 years ago / 1

    Overall dimensions? 3D models? I'm kind of surprised that one or both of these aren't here on the product page. I think I managed to figure it out on my own, but it'd be nice to have some of this readily available.

  • jfadams / about 8 years ago / 1

    Anyone know how thick this is (bottom of board to top of battery holder)?

    • M-Short / about 8 years ago / 1

      According to the datasheet the battery holder is 4.2mm. The PCBs are 0.8mm. You probably want to add in a bit since the battery holder isn't flush with the board and does have a bit of solder under it, but it should be about 5mm.

  • Member #848168 / about 8 years ago / 1

    Is this hand washable without batteries?

Customer Reviews

4.5 out of 5

Based on 13 ratings:

Currently viewing all customer reviews.

2 of 2 found this helpful:

LilyPad Coin Cell Battery Holder

My Grandson wanted to add LED s to his Fidget Spinner. We tried a conventional holder, the leads were in the way and did not bend, but broke off. The LilyPad has a flat base. He now has a somewhat weighty spinner with Three Switched LEDs, Happy Kid!

1 of 1 found this helpful:

Worked just as it had been explained

I had a complicated Cosplay outfit to make for my son. I ordered the lillypad not knowing if it would work and not having time to try something else. It worked beautifully! What a simple and fun product that can be used for so many different things. Thank you Sparkfun.

1 of 1 found this helpful:

Great buy

I needed a switch to light from within a tiny sculpture I made. The lilypad was the perfect fit and function.

Poorly assembled

I ordered 30 of these. The metal casing that holds the battery lifted off the board on a number of them, so the connection was poor and did not securely hold the battery in place. Other than this, I am a fan of SparkFun. I LOVE their stuff!

I'm sorry to hear that happened to your boards! This isn't something that normally happens with this product. Please get in touch with our technical support team at and we can help you with this.

0 of 1 found this helpful:

perfect for the project

My high school students are sewing circuits for their final exam. They are using these to hold their batteries and work as their switch. We all agree they are awesome! Great product and price!

Perfect for small projects. Easy to work with and a good price.

Excellent product at a good price.

Exactly what I needed.

Easy to work with and great for small cosplay projects. I used mine for LEDs in a mask! I'll definitely be buying more of these for future projects.


Work as expected :)

Nice little coin battery holder/ switch

Well made, high quality and dependable.

Great product!

I use these holders in a non-standard application that needs very consistent tolerances, and I am never disappointed by the quality.

Does the job, but a little fragile

I've worked with many of these and generally have not had much problem, but I dropped this one on the floor, and the battery casing fell off. Soldered right back on, but was a little surprised at how loose this one was fitted.

Otherwise, switch and everything else on it worked like a charm. If you're soldering something to the negatives rather than using thread, definitely be careful about not blocking the port for the battery and go from under.

Battery Holder

This item securely holds battery in place and has clearly visible positive and negative terminals.