Yes. I've bought replacement parts, upgrade and new hardware
from their online business; they have global affiliates and a good
reputation; better than most. Already mentioned Three batteries.
And maybe one more to go, in Mid 2012 MacBook Pro 13-inch.
And gave my iBook G4 with newertech/nupower battery, to good
friends down the road some miles. Had been refurbished by Apple
and was able to get OWC battery as replacement; when Apple had
nothing to replace their official batteries. ~ Also bought preferred
quality RAM memory upgrade chips; for several models of Mac.
They are among a few better brands to get, for upgrades, OWC.
Like most/all their stuff, guaranteed.
They suggest to calibrate replacement batteries a certain way to
be sure their internal power gauge will be accurate; and it works.
..Later, you can re-calibrate the battery, maybe once a year..!
• How to Calibrate a Mac Portable's Power System - NewerTech
https://www.newertech.com/batteries/power-calibration-guide/
I've only four Macs now. Unless I count one of the 485+ I repaired
..and donated to charity thrift stores; & persons who needed one.
[I've a PowerMac 7500 w/ Apple display, Apple OS 8.6, and full kit
accessories; plus spare vintage-antique keyboard, mouse; and etc.]
Now just 2 MacBooks (a MB/Pro & one 'first edition') +2 desktop Macs.
Be careful if you choose to replace the battery yourself. Instructions
are good but patience is better. [May help if you haven't much skill,
ASK local certified Apple service, IF they'd install a supplied battery.
I'd learn how, since what else could you do? That's how I do things.]
Some of those have glued-in batteries. With included removal tools,
gloves, instructions, and replacement glue! (With older ones, battery
accessed, by removal of screws.) Not earlier 'easy access' removable.
