calibrate battery

Usually newer Mac portables don't necessarily need calibration.

It is not good for batteries to be run down; keep them charged.

Generally the systems now try to 'optimize' the battery, if certain

things set or processes done; but that's not like 'calibration'.

The 'About Batteries' link below has many details that can help.

{..Doubt if this says anything about calibration though..}

Several helpful informative battery & power are covered well, in

lengthy detailed article; that also covers more than batteries.

• About Mac notebook batteries - Apple Support

https://support.apple.com/en-us/HT204054

Some third-party replacement cell makers suggest to calibrate

their cells, as matter of practice; when using their batteries. I've

used their instructions to re-calibrate older mac portable cells.

However to know when it may help, or not; has been from learning.

That said, your battery may have other things going on. Or, the Mac

could have issues with other parts of charging system, and the battery.

Symptoms of the issues, but not necessarily their cause, are evident.

• Determine battery cycle count for Mac notebooks - Apple Support

https://support.apple.com/en-us/HT201585

Other newer articles suggest other steps to calibrate Mac batteries.

This, older article from reseller of then new 'nu-power' brand of cells.

• Calibrate and Exercise Your Battery for Better Health, Run Times | blog.macsales

https://blog.macsales.com/27698-calibrate-and-exercise-your-battery-for-better-health-run-times/

• How to Calibrate a Mac Laptop's Power System - NewerTech

https://www.newertech.com/batteries/power-calibration-guide/

The calibration idea has limited usefulness, if you have failing

batteries and have run them flat; or charge/discharge them

in relatively careless manner to shorten their functional lives.

Some issues you face may be due to hardware problems. Given

time, these limited duration products are deemed 'disposable.'

And there are three main parts of the charging circuit that can

have wear related failure; these can be affected by bad habits.

(1. Battery, 2. Power Adapter, 3. DC-in Board; or I/O Combo board.)

MagSafe magnetic connectors on the power supply & companion

other half, (inside the MacBook) need care and cleaning to work.

Later portable Macs no longer use MagSafe-type connectors.

Their connective surfaces should be kept clean nonetheless.

This, in addition to cyclic care of the Mac portable's batteries.

And batteries can swell ~ enough to damage the Mac; before

they fail to hold a charge. Signs of failure happen before then.

Anyway, at 3:24AM (Sun.) ..I'm tired & worn 'my battery' down..

Take care & good luck!🌻🐝

PS: there also was, at one point in time, a battery replacement program for your model MacBook/Pro.

Details start with this following article, and had limits; with certain conditions attached:

• 13-inch MacBook Pro (non Touch Bar) Battery Replacement Program - Apple Support

https://support.apple.com/13inch-macbookpro-battery-replacement

The EtreCheck utility may reveal hidden items or other factors behind your Mac's status.

(A free running 'Pro' version can be downloaded from Maker's site; not from App Store.)

Good luck in resolving this matter!☼🐌🙂

{PS: trailing on this.. guess I'm done here!}

..re: kiwao..

With 13-inch and 15-inch that have DC-in Board, even those without MagSafe power adapter;

these have separate component in most incidence (with USB-C power ports; if not MagSafe)

To conserve battery power, and use AC adapter when grid power is present, is recommended.

Given several different build year constructs, these are best identified more exactly, by details.

For example, some had MagSafe power adapters; some four USB ports, some USB-C power;

& various other electro-mechanical details that separate their build-year-for better identity.

• Lookup Mac Specs by Serial Number, Order/Model & EMC Number, Model ID | EveryMac

https://everymac.com/ultimate-mac-lookup/

• Detailed Specs and Part List by various Apple identifiers - Lookup | powerboolmedic

https://www.powerbookmedic.com/identify-mac-serial.php

"Use serial number, Apple order number, or model number for detailed model info & part lists"

Seems there may be other details that may be looked into, revealed through use of EtreCheck

utility ~ to create detailed reports. Those can be shared in this Community in your reply's post.

• Using EtreCheck to Troubleshoot Potential Mac Issues - Apple Community

https://discussions.apple.com/docs/DOC-250000632

• See how apps affect Mac performance, battery runtime, temperature, and fan activity - Apple Support

https://support.apple.com/en-us/HT203184

(misdirected from O.P.= sorry!)

There is a fair amount of troubleshooting appears to be necessary, to sort out cause of these issues.

Good luck & happy computing!🌻🍀

kiwao wrote:

MacBook Pro 2017 13inch non Touch Bar model.

Thanks for the suggestion. I tried that but it still shut down at 43%. I’ll give it another try. Thanks

See if you qualify:

13-inch MacBook Pro (non Touch Bar) Battery Replacement Program- October 2016 and October 2017

https://support.apple.com/13inch-macbookpro-battery-replacement

kiwao wrote:

I have a MacBook Pro 2017 13inch non Touch Bar model. The battery was replaced in may 2019. Under battery info - condition normal, cycle count 131, mah . The last three days it has shut down at around 43%. I tried smc reset but it still shut down around 43%. I have searched on the net and found contradicting info regarding calibration. Some say calibrate others say it isn’t needed.

Can anyone confirm if it is necessary or not?

Try resetting the SMC https://support.apple.com/en-us/HT201295