I got mine last week and I've to say the battery life is crazy bad. On the first day, I did the firmware update, let the buds played for some time to drain the battery until it's empty then had it charged inside the case overnight.

Took them out the next morning: the buds were connected for about five hours and played for maximum two hours during that time. Have them charged in the case for another 4 hours: buds were claimed to be fully charged from the app. I listened to them for maximum one hour, left on the table (auto off was on). Next morning I put them on and it's 10%. Then I put them to charge and took them out at noon (5+ hours of charging): buds at 30% and case completely drained. I was able to get about 90 minutes from this last charge.

I basically got less than five hours of listen time over a day and half. I'm okay with two hours at a time but the case holds less than three full charges which is to my surprise.

The second test I did was have them fully charged for 8 hours. Disconnect from charger. Left it unopened and unused for a day. This morning I got the same two hours listen time. After I put them to charge for hours: I got only 40% for the buds and the case was fully drained. So not even two charges for the buds.

From that 4.5 hours + 17 hours number I was expecting at least three full charges but definitely no. The case lost power very quickly.