Concerning devices that store electrical power which can be used to run various devices in the absence of external power.
Questions tagged [battery]
1817 questions
16
votes
3 answers
Why does my MacBook Pro die without warning?
I have a MacBook Pro (about 18mts old) which has recently started to inexplicably die without warning. I'm running it on battery and, yes, it's getting close to the bottom end (between 10 and 25%). In the past I would get to about 10 minutes of life…
Gary
- 263
12
votes
1 answer
How does Coconut Battery determine a Macbook battery's design capacity?
A macbook's battery has three charge numbers:
The current charge
The maximum charge
The design capacity
Even if a Macbook remains plugged in, OS X does not attempt to charge—as long as (1) is 95% of (2), which is why the percentage in the…
Calaf
- 4,359
3
votes
3 answers
Battery Life on Macbook Pro
I've got a 15" macbook pro, i5 2.4ghz which I've inherited. When I use it to watch video -- with the notebooks monitor turned off, video piped to an external monitor - the battery dies in 90 - 120min.
Is this normal? Does that mean its time to…
Erik
- 177
3
votes
3 answers
How to start with a brand new battery?
Is there a special procedure to be followed when installing a brand new battery ?
Like
discharging it completely, or not;
leave it fully charged for a certain amount of time,
etc...
(It's a battery of a MacBook Pro)
Rabskatran
- 5,747
- 14
- 51
- 80
3
votes
1 answer
Apple Battery Charger Not Charging Sanyo Batteries
I've had the Apple Battery Charger for a good long while now. After I bought it, I also bought a couple 8-packs of Sanyo Eneloop HR-3UTGA batteries, known to be the same model of battery included with Apple's charger. They worked great until a…
Aaron Vegh
- 227
3
votes
1 answer
How should I interpret the full charge capacity (mAh) for a macbook battery?
in System Information it shows: "Full Charge Capacity (mAh): 7860". How should I interpret this figure?
Antonio23249
- 1,833
2
votes
1 answer
How much does it cost to service a MacBook Pro battery?
I have a mid 2009 MacBook Pro and I just got a message saying that I should service my battery.
I tried to reset SMC and NVRAM but the problem persists and I fear I'll have my battery replaced. How much is Apple going to charge me?
My Mac is out of…
mariosangiorgio
- 285
2
votes
2 answers
Used 2015 MBP Pro Retina dropped 300 mAh of Full Charge Capacity in three months
Back in February I bought an used 2015 MBP Retina and it had 251 battery cycles and 8440 mAh full charge capacity. Now after almost three months I felt like the battery life decreased a little bit and I was shocked to find in system Information that…
Bogdan
- 21
2
votes
0 answers
Is depleting batteries of MacBook Pro 2018 still a thing in 2018?
I was looking for battery related applications in Brew and found Battery Guardian which refers to an Apple page from 2011 as justification why this application matters. Referring an old page as justification it's a bit suspicious for me. Depleting…
AndrasCsanyi
- 193
2
votes
2 answers
How do I diagnose battery drain whilst asleep?
Today I've had my 2017 MacBook Pro asleep in my bag all day. I left home with it at 100% battery and ended up not using it for the entire day, I didn't even open the lid. When I got home, I opened it and it was at 0%. Here is the chart from the…
James P
- 149
2
votes
1 answer
How do I recycle old MacBook Pro batteries?
Can I return an old 15-inch MBP rechargeable battery to Apple, or does it have to be disposed of locally?
aeismail
- 270
2
votes
1 answer
Can I safely use my Macbook battery on another MacBook?
A friend needs a battery for his MacBook and I do not use my own MacBook battery, having changed to another laptop. My battery is fairly recent.
Is it safe to use my MacBook battery on his laptop? I cannot see any reason why it would not but thought…
Fr.
- 920
2
votes
1 answer
Is there a software that tells for how long the computer has been running on battery?
There are many apps in store that will tell you how much your battery will last before the computer turns off.
I need something that tells me something like : "You unplugged at 95% and have been running for 2 hours and now have 55% "..
So like a…
Koray Tugay
- 1,404
2
votes
1 answer
when it say "Built-in battery", then does it mean that "battery is not user-replacable"?
Read this line in iPhone 2G specification http://en.wikipedia.org/wiki/IPhone_2G
Built-in rechargeable Li-ion battery 3.7 V 1400 mAh
So, "Built-in battery" means "battery is not user-replacable"?
Is that true?
Or, "built-in" means "hard-welded" (ie…
Tim
- 125
1
vote
2 answers
Are old unused macbook batteries ok?
I'm considering buying a Geniuine Apple Macbook Pro (2007) battery on ebay. This is NOT an OEM knockoff, and the battery is still sealed in original plastic, but I have no idea when the battery was manufactured.
If the battery was made, say 5 years…
themirror
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