LED on CR2032

[Lyyle Morgan]

TL;DR Summary

LEDs on CR2032?

I want to run a 2' multicolor LED strip with 2 CR2032 batteries. Is this possible?

 

[Gordianus]

Internet rules say that writing with caps on is equivalent to yelling. Having said that, how many leds have your strip? [Note: all caps OP has been fixed by the Mentors]

 

[berkeman]

What is the terminal voltage of a CR2032 button battery? What is the A*hr capacity rating of a CR2032? What is the input voltage and current specified on the datasheet for your LED strip?

Do you know how to build/use buck and boost DC-DC converters?

 

[Tom.G]

Not for long.
The CR series batteries are designed for very low current application with a few years usable life.

You would be better off using Zinc-Maganese Dioxide (Zn-MnO₂) batteries. They are commonly called Alkaline batteries. The smallest I know of are the size "N" cell, about 30mm long x 12mm dia.

Cr2032
Lithium/Manganese Dioxide
Open Circuit: 3.0V
Max continuous Current: 6mA
Nominal Capacity: 245mAh @170uA and 2.0V cutoff

Above from:
https://www.duracell.com/wp-content/uploads/2021/06/CR2032CH_245mAh-CS.pdf

Cheers,
Tom

 

[Lyyle Morgan]

What is the terminal voltage of a CR2032 button battery? What is the A*hr capacity rating of a CR2032? What is the input voltage and current specified on the datasheet for your LED strip?

Do you know how to build/use buck and boost DC-DC converters?

Thanks for the input, but I don’t have the answers to your questions. This is just a starting point to an idea I have. Just want to know if it’s even possible. Thanks again

 

[Lyyle Morgan]

Not for long.
The CR series batteries are designed for very low current application with a few years usable life.

You would be better off using Zinc-Maganese Dioxide (Zn-MnO₂) batteries. They are commonly called Alkaline batteries. The smallest I know of are the size "N" cell, about 30mm long x 12mm dia.

Cr2032
Lithium/Manganese Dioxide
Open Circuit: 3.0V
Max continuous Current: 6mA
Nominal Capacity: 245mAh @170uA and 2.0V cutoff

Above from:
https://www.duracell.com/wp-content/uploads/2021/06/CR2032CH_245mAh-CS.pdf

Cheers,
Tom

Hi Tom. Thanks for speaking in a way I can understand. I’m looking to power the strip for a couple of hours. Just wondering if this is even possible. I’ve found a case that holds 2 CR2032s and has wires leading out. Wondering if the wires could be connected to a 2’ strip of LEDs. Thanks again for getting back to me. Lyle

 

[berkeman]

Thanks for the input, but I don’t have the answers to your questions.

The point of my questions was for you to look that information up. That is how you answer your original question of whether it is possible.

 

[Lyyle Morgan]

Not for long.
The CR series batteries are designed for very low current application with a few years usable life.

You would be better off using Zinc-Maganese Dioxide (Zn-MnO₂) batteries. They are commonly called Alkaline batteries. The smallest I know of are the size "N" cell, about 30mm long x 12mm dia.

Cr2032
Lithium/Manganese Dioxide
Open Circuit: 3.0V
Max continuous Current: 6mA
Nominal Capacity: 245mAh @170uA and 2.0V cutoff

Above from:
https://www.duracell.com/wp-content/uploads/2021/06/CR2032CH_245mAh-CS.pdf

Cheers,
Tom

The round shape of the CR2032 is perfect for what I need. I’m not sure how I could mount the N. Thanks

 

[Babadag]

I agree with Tom.G
First, in my opinion, CR 2032 supplies 3 V and Led strip requires-5 to 24 V -depending on type.
The load current for LED strips may be 2400 to 7200 mA but CR2032 capacity it is only 235 mAh that means 235/3600=0.06528 mA that means if itsupplies a 0.06528 mA load the voltage will be only 2 V [minimum level] in an hour.

CR2032 resistance Rdc≈15 kΩ and LED Strip load resistance is 3/7.2=0.417 Ω that means a short-circuit for CR2032.