caretu Wrote:
>The SIIG 2400 has a capacity of 2400
> mAh, which should give nearly 17 hours of
> operation according to what we know so far. Where
> did the missing 10 hours go?
>
Most likley the SIIG doesn't really have that kind of capacity. The battery industry bases their estimates on capacity on a factory new battery, but rechargeable batteries lose max capacity over time. Lithium Ion batteries are particularly bad for this, even though they start out with the highest max capacity per volume, which is why they are standard on any cell phone these days. If you own a cell phone with battery older than a year, it's likely that your battery doesn't hold a charge for half as long as it did when you first bought it. LitIon can 'rot' even on the shelf before you buy it, so depending on when the battery was manufactured, a new 2400 mAh battery could have been down to 2000 before it was purchased.
>The SIIG 2400 has a capacity of 2400
> mAh, which should give nearly 17 hours of
> operation according to what we know so far. Where
> did the missing 10 hours go?
>
Most likley the SIIG doesn't really have that kind of capacity. The battery industry bases their estimates on capacity on a factory new battery, but rechargeable batteries lose max capacity over time. Lithium Ion batteries are particularly bad for this, even though they start out with the highest max capacity per volume, which is why they are standard on any cell phone these days. If you own a cell phone with battery older than a year, it's likely that your battery doesn't hold a charge for half as long as it did when you first bought it. LitIon can 'rot' even on the shelf before you buy it, so depending on when the battery was manufactured, a new 2400 mAh battery could have been down to 2000 before it was purchased.