Replacement Battery for Harman Kardon Onyx, 3500mAh Battery for Harman Kardon Onyx Studio 1, Onyx Studio 2, Onyx Studio 3, Onyx Studio 4 Bluetooth Speaker, LI11B001F Battery with Tool Kits

This works as anticipated, the installation can be a bit tricky, but it is easily workable with a limited number of tools. A couple of suggestions for installation. Watch the installation videos, like on Youtube. Put in the model of your speaker and then 'batter replacement'. Several will come up and they are really helpful. A couple of tips for the HK Onyx Studio 4 specifically, since I didn't find many videos on that specific model. They switched from Torx to Philips screws which is easier if you don't already have a set of Torx screwdrivers. After you get the initial cover off the speaker, there are five rubber grommets, you need to remove each of the rubber gromets (I used the tool with the battery and a pair of needle nose pliers. Be careful, but firm to remove them. The Philips head screws are under those grommets to remove the case. It is much easier to gently remove the two plug wires from the control board then trying to keep them connected. This specific battery has a shorter cord than the original, which isn't a problem, but when you remove the foam from the old battery wire, you need to wrap it slightly differently on this replacement to make sure the extra small tab of foam wrap goes into the opening from the batter compartment. The wires on this replacement are thinner and shorter than the original battery. Not an issue, but to be aware of while rewrapping the foam. Some people will be tempted to skip removing the foam from the old battery wire and putting it on this one. The foam makes it so that the battery cord doesn't vibrate. There are few things more annoying than listening to music with a vibration from within the battery. Finally, when reassembling, it is easier to attach the longer wire (the wide plug) first, and then the battery plug wire onto the control board. In general, I would recommend this. It is slightly smaller then the original battery and yet provides longer battery life than the original, which is pictured here.

Got my device back up and working without a plug! Very easy to install too. Perfect fit. Battery life is super, I haven’t had it due on me while listening to must yet.

I used it for a replacement battery in my Harman Kardon Bluetooth speaker. Pretty much the same of what was in there except it is a 3500. Where as the original battery I took out was a 2600. The wires on this battery are thinner than the wires on the old battery and they are not suppressed with padding so I just took the padding off the old battery wires. The length of the wires are the same and the three prong plug works as it should. I did notice I do get about an extra hour out of the battery with volume at mid level so it is a little bit better than the older battery I had . For the price it is decent quality.

Works great. Two things worth knowing…1) it is slightly smaller than the original, so it helps to move over the cushioning spacers from the original, as well as the rubber wire protector/sleeve; 2) mine did not come charged…it takes several hours to fully charge.

Works great easy installation perfect fit

Made my speaker wireless again. Installation videos available on youtube.

Excelente producto

I did not know that my Hardan/Cardon Onyx 4 had a battery in it. I have always used it with the power chord that came with it. The Onyx 4 is less that 3 years old and all of a sudden... it's DEAD! So, I purchased this upgraded battery and guess what... it's still DEAD! So, what is the real deal? What is the power chord for if it does not POWER the unit? Maybe my power chord is bad?!?! I don't know. What I do know is that I have a Bluetooth speaker that I will not trust as a paper weight. I'm open to suggestions to get this speaker working. Since I have to give a rating to post this, it's 1 star.