Cameron Sino 3400mAh / 12.58Wh Li-ion High-Capacity Replacement Batteries for Harman/Kardon Onyx studio 1, Onyx Studio 2, fits Harman/Kardon LI11B001F

Excellent. Speaker now charges and play longer than on stock battery

It’s a battery, seems a little cheaper than the original, but it works. You have to add some padding so it doesn’t rattle around. I’ve only had it for a month and it seem to work.

Directions were sufficient and most will be able to complete the process. Working fine so far.

The original battery played for about 30 min at Max volume when new. The old battery was down to about 30 min at -10Db. This battery new and charged overnight played six minutes 30 seconds at -10Db before the speaker shut off. I bought 2 and they are both like this. I have tried 3 chargers, including a brand new one. Even if these batteries worked, the short wires would fatigue and break the circuit board connector in time. Add to that the original battery (on the left) used 16ga wires and this one (on the right) uses 20ga wires, it is clear that this battery was never intended for high current applications like my Onyx studio 3 speakers.

I bought this because the battery was dead on my Harmon cardone it wouldn't charge and it would only work unless I had it plugged in so I bought this battery and now it does hold a charge but only for so long and if I raise the volume all the way up it will cut off immediately so I suggest that you go ahead and upgrade on YouTube and add some more batteries that's what I did and now my Harmon cardone last forever

Battery seems to work like the new one did when I bought this speaker

I’ll make it simple, it’s the right battery and works just right.

The battery cuts out when you put the speaker on max volume. This battery is 3400mah hours when the original battery was 2600mah. So you would think it could handle the speaker. However it randomly cuts out.