Hello, I have a wireless mouse with 1.5v AA battery. Yesterday, I just found an AA battery size li-ion battery form a touch light. I would like to know if I can replace 3.7V li ion battery instead of 1.5v AA battery in my wireless mouse.

 

Hi Htin,
I would advise you not to use a 3.7V battery, it will most likely damage the mouse electronics

E

 

I would like to know if I can replace 3.7V li ion battery instead of 1.5v AA battery in my wireless mouse.

Only if you want a mouse that will likely no longer work.

Why do you want to replace the AA alkaline battery with a Li ion one?
My wireless mouse runs for months of daily use with a half discharged battery (down to 1.2V) I have removed from other devices that stop operating at that voltage.

 

Replacing the battery with a different type will require some modification to the battery holder. Seems like a lot of work.

Do you want the battery to be rechargeable? If so - just how do you plan on charging it? Different battery chemistries require different charge profiles. You can't just throw one battery in place of another without considering all these options.

I have some CRV3 batteries that are housed in a double pack. They're wired in parallel, and each cell provides 3V at 1A. So two batteries in parallel will give you 3V at 2A. But if you take them out of their packaging they are about the same size as an AA battery. WARNING: Each cell is 3V. If you put them individually into a mouse you're going to get 6V out of it and watch your mouse die a swift death.

Modifications always require a lot of consideration as to how to construct, what materials to use and how much you want to spend. If it's a wireless rechargeable mouse - go buy one. Faster, easier, and in the long run - cheaper.

 

Your no-name-brand battery looks like very poor quality. My Energizer alkaline and Ni-MH batteries work fine for a long time.
Energizer also make 1.5V Ultimate Lithium batteries with very good specs.
Online in China there are AA batteries with a small 3.7V rechargeable battery cell, a USB port for charging and a voltage converter with a regulated 1.5V output. I do not know if they work well.

 

Maybe he's asking if there's how to do it. Yes, there is. But either way you'll probably need another PCB to condition your supply voltage to match the expected input voltage. And everyone seems to agree that it's too much work to adapt something that there are other ways to make it work good too.
Edit: I didn't see before the @Audioguru again post, it's the best solution I think.

 

Your no-name-brand battery looks like very poor quality. My Energizer alkaline and Ni-MH batteries work fine for a long time.
Energizer also make 1.5V Ultimate Lithium batteries with very good specs.
Online in China there are AA batteries with a small 3.7V rechargeable battery cell, a USB port for charging and a voltage converter with a regulated 1.5V output. I do not know if they work well.

Thank you for your response and the helpful information on Energizer batteries. Living in Myanmar, where economic constraints often limit access to premium products, we rely on more affordable options, including those from China. The innovative AA batteries with a built-in 3.7V rechargeable cell and voltage converter you mentioned caught my interest. In our context, such solutions play a crucial role in ensuring that everyday devices remain functional. Despite the challenges, we make the most of what's available, including repurposing components from sources like Japanese used bicycle batteries. Your insights offer a broader perspective on the diverse ways people address their needs globally.