As a Touch 4th gen user, i solved my battery duration with a little 10 euro 2600 mAh powerbank.
Its another object in the pocket (with 32-pin cable) but there are slim powerbanks and short lightning cables in the market.
And after all, i only need to charge the powerbank.
For me, i prefer the portability of iPod touch with the power of A8 SoC.
Unfortunately it costs 239 euros in my country...