This is the 14437th most frequent Polish word.
przenośna
Portable.
Here, "przenośna" characterizes a battery that is easy to carry and suitable for mobility.
Przenośna bateria jest przydatna podczas podróży.
A portable battery is useful during travel.
The word "przenośna" here describes an object (the printer) that can be moved or carried easily.
Moja przenośna drukarka świetnie działa.
My portable printer works exceptionally.
In this sentence, "przenośną" qualifies an alternative, emphasizing that it's portable.