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30

Indeed. Contrary to what most people think, the power circuitry is usually smart enough not to charge the battery after a threshold. The primary issue is temperature.
– mmx
Commented Jul 24, 2009 at 17:31
11

Apple MacBooks actually run slower when you unplug the battery, as the A/C adaptor cannot provide all peeks that may occur in power usage. I guess this may be true for other brands as well, so even though it may increase battery life, I'd not recommend to take the battery out. See tomshardware.com/news/… and Apple's support.apple.com/kb/HT2332
– Arjan
Commented Jul 24, 2009 at 17:46
4

I read somewhere that removing the battery while on AC power might leave the laptop vulnerable to damage from power oscilations. Is there any sense to that?
– Malabarba
Commented Oct 9, 2009 at 4:36
1

@Mehrdad - Temperature and keeping them fully charged shorten their life. Now find a laptop that doesn't cook its battery while running. @Arjan - Windows default power settings are generally to conserve more power at the expense of performance when running on battery. However, if AC power is connected then the battery is not needed, after all, the PSU can supply enough power to charge the battery AND run the laptop. @Bruce - no more so than any other PC. They use a switchmode PSU which are normally fairly resilient to crappy power.
– pipTheGeek
Commented Sep 6, 2010 at 11:38
1

Make sure you tell the laptop to hibernate or standby after x time, if on battery. that's v important, or one day, the power cord may come lose and you won't know and you come back and find your laptop off. Or you just left it on battery by mistake and it went off.. I suppose you don't want to do that to the battery.. (unless it's new and you're cycling it as per instructions the battery came with)
– barlop
Commented Apr 10, 2011 at 12:31

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