JBL flip 4 vs Sony SRS-XB22 battery life camparison.

I recently bought a Sony SRS-XB22 as I'm obsessed with portable speakers. The speaker is an overall a good bang for your buck with one down side, it's battery life. I already own a JBL FLIP 4 for a long time and I enjoy it very much. They both have pretty much equal battery specs as a 2700mAh in XB22 and 3000mAh in FLIP 4. When I use them I can see a very huge gap in listening time of these devices. The FLIP 4 can reach almost 2-3 days with my average use but the XB22 can't even survive a day of similar usage. What's the reason for this? I'm sure the 300mAh gap isn't a very big problem for a 2 day gap.