USB convenience depends on the whole system
The presence of a port does not establish that a battery is included or that your device will charge at a particular speed. Check connector types, the internal cable and any separate power-source requirement. If you do not intend to use external cable routing, compare the explicitly no-USB listing before paying attention to this feature in the decision.
Work use needs more than a device label
A 15.6-inch claim can narrow a shortlist, but sleeve measurements and surrounding storage determine everyday usefulness. Check how files and a lunch container fit alongside the computer. The waterproof adjective does not describe seams, zippers or openings here, so obtain the actual protection details before assuming the bag can keep electronics dry in prolonged rain.
