It has a 150 mAh battery, so even with Shuffle’s optimization level,2200 mAh should still last more than a week for Tangara. I gave Nano 7 as an example because it’s what I have. Of course I’m not expecting Apple level optimization but they can do much better. Otherwise 2200 mAh is an overkill for such a device.
It needs a serious optimization. iPod Nano 7 lasts 30 hours with a 240 mAh battery. So with 2200 mAh, it should last like 10 days at least.
Ipod shuffle lasts 12 hours with an even smaller battery
https://en.wikipedia.org/wiki/IPod_Shuffle
It has a 150 mAh battery, so even with Shuffle’s optimization level, 2200 mAh should still last more than a week for Tangara. I gave Nano 7 as an example because it’s what I have. Of course I’m not expecting Apple level optimization but they can do much better. Otherwise 2200 mAh is an overkill for such a device.