At 54.5 Wh, this battery doles out ~27% less power between charges than last year's edition—although with just three cells instead of six, it might be a tad easier to remove.

That said, this Pro actually packs more oomph than its Touch Bar-equipped sibling, whose battery clocks in at 49.2 Wh.

Up top, we find this battery control board which — unlike the impeccably manicured components surrounding it — is coated in thick epoxy à la Apple's Lightning-to-headphone dongle.