On Sat, 19 Aug 2006 20:10:53 -0400, "pen"
<nospam@nospam.com> wrote:
>
><bob@coolgroups.com> wrote in message
>news:1156027278.587778.195080@i42g2000cwa.googleg roups.com...
>>I think I have a 4 ampere-hour battery in my laptop now. It lasts
>> about 2 hours.
>>
>> If I get this
>>
>> http://www.tigerdirect.com/applicati...4144&CatId=233
>>
>> , which is 40 ampere-hours, does that mean I could hook my laptop to
>> it and get an extra 20 hours?
>>
>> Thanks.
>
>That's a really terrible price for a UPS. Better ones are available for
>half that price from reliable vendors.
>http://www.newegg.com/Product/Produc...82E16842101141
>
>As to how long it will run your laptop you will have to look
>at the power drain of the laptop from the AC line
>as the UPS works at the AC line level. Do you really want to schlep a
>13 pound brick around?
I make no call about whether the UPS Bob linked is a good
value but it is quite different from the one you linked in
that it is targeted for continual, *long* term use.
It has 40AH battery and would necessarily have to be
engineered to stay cool enough, while the more common type
you linked, is only meant to run for a few minutes and may
not (isn't usually) able to run hours at a time at the rated
output (and indeed, it couldn't since I have one somewhere
and recal it has only a 7AH battery.
laptop 
Linear Mode
