Battery capacity is proportionate to physical scale, but the 6a lacks the wireless charging of the Pixel 6 and it can't charge quite as quickly either. As you can tell from my quick comparison ...

The entry-level 6a has the smallest screen in the Pixel 6 lineup but was acclaimed ... For example, there is no more wireless charging, and the screen refresh was lowered from 90Hz to 60Hz.

There’s 18W charging speeds, but no fast-charging on this device. Pixel 6a will look familiar, too, adopting the recognisable camera bar ... And since you’re getting the Pixel Buds A-Series thrown in ...