1
vote
3answers
123 views

Achieving fast boot, encryption, and battery health on a Mac portable [closed]

My current computer is getting old and I'm going to switch to a Mac when I replace it. I'm looking for a setup that has these properties: Turns on as quickly as possible I still have a usable ...
0
votes
0answers
49 views

Ubuntu sleeps after disconnecting power

I've Lenovo S400 laptop, dual boot with windows 7 and ubuntu 13.04. The problem is that whenever I disconnect the power adapter, ubuntu shows that that battery level is critically low and goes to ...
4
votes
3answers
1k views

System connected to UPS goes to sleep short time after power is lost

I have a Win7 x64 system connected to the UPS. The UPS is capable of maintaining the system power for about 30 minutes. After I have connected the UPS, I have verified this by disconnecting the power ...
0
votes
1answer
2k views

How do I tell Windows 7 that I don't have a battery backup?

One of my computers recently started going to sleep at seemingly random intervals. Upon examining the system log, the reason is always the same. "The system is entering sleep. Sleep Reason: ...
2
votes
1answer
495 views

Windows 7 low and critical battery levels cannot be set lower than 10%

How do I change the low and critical battery levels to below 10%? I understand that this is a reasonable limit for most portable computers, but what about those with large batteries? On my computer ...
1
vote
3answers
288 views

MacBook has started shutting down when at 5% battery

This is new, just started this month: Usually it would last until 0%. For a few days it had been shutting off at around 4%. Last night it shut off at 5%... really hope tomorrow night it's not 6% and ...
0
votes
1answer
1k views

Macbook shuts down when battery is empty (should have went to sleep)

In the past few weeks, my macbook shuts down when the battery dies. The battery does not even die at 0%, sometimes it shuts down at 5% or 10% remaining. I tried calibrating the baterry following this ...
3
votes
1answer
2k views

MacBook Pro (MacBookPro5,3) not sleeping but shutting down when battery gets low

I've got a MacBook Pro (revision 5,3) which was produced in the middle of 2009 and has 49 charge cycles. When it was all new, it showed a battery capacity of around 6500 mAh. Now that I've been using ...
1
vote
3answers
163 views

How to estimate laptop sleeping time on battery?

In simple terms, if battery time is approximately known, how can one estimate how long a laptop can "hold on" in sleep mode, before battery goes dead ? Apart from literally taking a watch and ...
9
votes
6answers
11k views

What is the impact of leaving a laptop in “sleep” mode (while on battery power)? [closed]

How much battery would leaving my laptop at "sleep" mode consume? is the consumption low enough so that it would be safe to leave the laptop sleeping at nights regularily and using it tommorow? ...
13
votes
2answers
10k views

Can I run my MacBook in clamshell mode without being connected to power?

At home, I run my MacBook in clamshell mode (closed lid, external display). This works fine when you're connected to the power adapter, but it doesn't work when running on battery. That's how it's ...