I'm looking for battery for my laptop Acer Aspire 7745G. I need the largest possible capacity and for me it doesn't matter how heavy it is. As I read in Acer website, more cells means higher weight and capacity. But I didn't find explanation anywhere what's bond between mah and cells quantity. After all, mah also means battery capacity. Maybe you could also recommend me battery for Acer Aspire 7745G?(optional)

  • For modern, quality, commonly used 18650 cells, you can expect up to around 3.5 Ah. At a nominal voltage of 3.7 V, that translates to just shy of 13 Wh per cell. – towe Dec 12 '19 at 14:20
  • Thanks for comment, I probably need about 9 Ah. But I found maximum available only 7.8. Now I think, maybe better for me would be powerbank – Pranciskus Dec 12 '19 at 15:30
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    I'd probably agree. Most manufacturers don't offer batteries over 100 Wh, since that's usually the limit you're allowed to take on planes as a single unit. If you can afford to momentarily shut down the PC, you could just buy a bunch of batteries and keep swapping them. Some laptops even allow a very short time of operation without a battery for this, but I don't think that applies to yours. – towe Dec 12 '19 at 15:37
  • Here I found this battery for my laptop and it shows real capacity to be 6Ah and 9 cells. So, does it mean that this battery has 6x9 (54Ah)? Because, this says that – Pranciskus Dec 12 '19 at 16:13
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    "Laptop batteries normally tell the capacity of an individual cell and how many cells they have", right? – Pranciskus Dec 12 '19 at 16:13

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