Replacement Battery for Logitech UE MegaBoom Compatible with S-00147 984-001362 084-000845 Ultimate Ears Megaboom 3 Megaboom 3 S-00171 fits Part No Logitech 533-000116, 533-000138,7.4V Li-ion

It was easy to install and charged up just fine.Used my speaker and played for at least ten hours and had 30% left. Charged battery and put the speaker up for another day. The tool broke due to not understanding how the cover is released to access the battery. Managed to get the cover up to change the battery without breaking it. Side note watch videos to get a feel of how to release the cover.

This battery came about 30% charged. You need to make sure you lift the tape on the top( charging side) so you can lift battery out of its nest if needed. Once installed it charged to 100% and us working as new. Watch utube for “ similar” videos about how to change the battery. These things are a few hundred$$$ and i got mine back and working for less than $30.

I purchased this replacement battery twice over 3 years and yes, I know I’m trying to hold onto an older UE Megaboom speaker, but the speaker works perfectly when it works. The latest battery I purchased was in 2025 and the speaker is used as a garage speaker when I’m working in the yard or on the cars. The latest one didn’t even last a year and I hardly used the speaker. I would not recommend buying this brand battery again. Check elsewhere.

I watched a YouTube instructional video and decided to give it a shot. For the cost of this battery, it was way better than paying for a new speaker. I have a Megaboom 3 that’s a couple years old. It was dying within 15-20 minutes after maxing the volume out. With this battery, it lasts for hours again. The only technical issue is it flashes low battery ALOT when it’s at 60%-90% but whatever. You will void a warranty replacing the battery yourself so if your within warranty range, keep that in mind.

When my UE MegaBoom 3 speaker needed a new battery and the OEM option was nowhere to be found, I turned to this replacement battery. Despite being slightly larger in capacity than the original (3130mAH/22.5Wh 7.2V vs 3400mAh/25.16Wh 7.4V), it fit seamlessly and worked without any issues.After three months of usage, I can confidently say that this replacement battery does the job well. It holds a charge effectively, keeping my speaker running for extended periods without trouble.One crucial tip for users is to perform a calibration when installing the new battery. Charging it to 100%, allowing it to discharge completely, then leaving it plugged in overnight ensures accurate battery percentage detection by the speaker's circuitry.It was super easy to dissamble the speaker just be careful with the gasket, and forget about putting your speaker in the water after this replacement, at least I wont even try to do it.Overall, I'm satisfied with the performance of this replacement battery. It may not be identical to the OEM option, but it gets the job done reliably, keeping my UE MegaBoom up and running for extended listening sessions.

Definitely look up a YouTube or I fixit video on how to replace the battery. The speaker is really not made to be taken apart and put back. Just be careful when taking the parts off. Other than that, it's perfect for bringing an older speaker back to life. Just don't think it will still be waterproof afterwards. Mine looks pretty good after. Just a few nicks in the grill.

Just what I needed to fix my speaker. Was only working while plugged in even though it said 100% battery. Easy to install with many YouTube videos to choose from. Took me about 5 minutes to do although I have already had it apart before to replace a blown passive radiator, but still was easy to do. Just take your time so you don't break anything and it will go smoothly.

Didn't hold a charge after a few uses. Now it won't charge at all