Replacement battery fully charges, but does not last long
Question for the field: I just replaced my mid-2010 unibody MacBook Pro battery.
Went through the full recalibration process (fully discharged and recharged) and reset to the default power saver settings, but the battery only has about 3 hours of life. Running minimal apps: a few tabs open on Firefox, iTunes, MS Word, using Wi-Fi, screen is not at a high brightness level, etc. Running iOS 10.11.16 El Capitan.
I’ve noted additionally since the new battery was installed that the Mac’s Search function hangs up entirely, and the Wi-Fi connection frequently needs to be reset.
Any thoughts? Could this be an issue with the OS? Should I perhaps repeat the calibration process?
Thanks very much for any ideas you have!