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I'm looking for a new battery for my Acer Aspire 4741g laptop. I am trying to get a higher capacity battery.

Many sites (like this one and this one) list batteries that are interchangeable with the battery that came with the laptop (AS10D41). These batteries have higher capacity, but also marginally lower voltage (11.1V vs. 11.8V). Is this a problem? Does it mean that the battery is actually incompatible? The replacement battery I am looking at is AS10G3E, and is listed in many places as being compatible with the AS10D41, but nobody makes any mention of the differing voltages.

I am trying to find out what kind of problems a lower voltage battery can cause. I know P=IV; with reduced voltage, will the machine draw more current, possibly damaging components? I'm just speculating, but I'm worried about the chance that using a battery at a lower voltage will damage my laptop.

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closed as off topic by Mehper C. Palavuzlar, Journeyman Geek, Joe Taylor, studiohack Mar 14 '11 at 20:13

Questions on Super User are expected to relate to computer software or computer hardware within the scope defined by the community. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about reopening questions here.If this question can be reworded to fit the rules in the help center, please edit the question.

Can you please rephrase the question so that it moves away from the "Buying recommendation"-Close-reason and more towards "How much does the battery-voltage matter"-section? – Bobby Mar 14 '11 at 11:38
I have added a bit more to the question to better ask my question as to weather it will cause problems to use a lower voltage battery – Hugoagogo Mar 14 '11 at 11:44
up vote 0 down vote accepted

The power from the battery will have to be converted into a number of other voltages regardless of the voltage of the battery:

  • +/- 12V
  • +/- 5V
  • +/- 3.3V

Plus others internally depending on hardware requirements (such as 1.75v for Vcore for some processors etc).

Even an +11.8v battery will have to be adjusted (through a DC-DC convertor) to +12v.

There should be no real difference in this. Yes, the step-up to 12v will be slightly harder work, but then the step down to 5v and 3.3v will be less work, so it should all even out.

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Seems a valid answer – Hugoagogo Mar 14 '11 at 12:04

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