Feed
 

Laptop battery power loss

Avatar John Nicholas
My wife purchased a 2019 16" MacBook Pro from Cex in August 2025, with a 5yr warranty. Obviously we imagine wear & tear, accidental damage , and other possible items are excluded. However usage of the Laptop is light and we would not have expected the battery to fail in less than a year.

However fully charged and turned off we have experienced battery power loss for a while now and, today 48 hours after last 100% charge, the level is showing below 10%.

Is something awry or is the battery at the end of its life?

Haven’t contacted Cex yet; should they rectify at their cost?

Advice and comments please.

If we have to get battery replaced…….where and what cost?

Re: Laptop battery power loss

Avatar John Nicholas
Have read older posts (2021 ?) and I fight shy of tackling DIY battery replacement, .......but Apple's apparent today price for new battery is circa £245.

Have gone in to System Settings > Battery , and battery health shows as 'Normal' rather than Service recommended. It happily charges to 100%, ie it doesn't fail to reach 80%.

So superficially battery is ok after all? But why the power drain (yes always turn off rather than put to sleep). As I said in the original post, is something else awry?

I suppose could get a "Genius" at Apple to run checks on what is up. Then if Cex need to honour warranty I would know what needs attention (Removable Batteries are counted as consumables and are not warrantied. Even though posts about removal describe Laptop batteries are almost fixed /glued in).

Re: Laptop battery power loss

Avatar Mick Burrell
Unless it's already had a new battery, I'd expect it to need one after 7 years!

macOS doesn't have the same feature as iOS but if you check on a phone, you'll see Battery Health. This will show something like 80% which means that after a full charge (which will show charged to 100%), the battery is only capable of performing to 80% of what it was when new.

Check the Mac App Store - it's full of battery health monitors! One of these may give you more insight though my money is on a dead battery. Not sure what the situation with CEX will be if that is the case.

Re: Laptop battery power loss

Avatar Douglas Cheney
You could have a word with Adamant at this web page he seems to be very good with Apple products and has repaired two of my Grandaughters Mac Book Airs at reasonable cost https://adamantit.co.uk

Re: Laptop battery power loss

Avatar John Nicholas
Thanks chaps. Have downloaded a health monitor app and all "appears" ok.

I overaged the 2019 model laptop because I see it was manufactured April 2020 !! But Mick, I take your point.

So, for the moment, we will keep an eye on things and try to keep a note of what occurs to see whether we can fine tune the diagnosis/prognosis.

Re: Laptop battery power loss

Avatar Tony Still
Just to add a little nuance to Mick's reply, if you can run macOS 26 (Tahoe) then there is a built-in battery status of sorts.

System Settings > Battery (near the top) and click on the 'i' icon next to battery health.
 
Feed