Looked like a good fit, but it's not.
The 1500mAh battery fits older Void models, but it's too thick for the Void Pro that I purchased in 2019. It's about 8mm which makes the speaker press on the battery and the holding bracket has to be removed. Though I managed to squeeze it in, it's a bad replacement and I'll order another battery right away.
If you have the latest model, your maximum fitting battery dimensions are 50x40x5mm. If the holding bracket is removed, you could fit a 6mm thick battery.
That being said, I haven't found a proper replacemnet yet. Most batteries come with a two pin connector.
