[Liverpool] External universal laptop battery

[Sebastian]

Thanks Andrew. I suppose that might be the reason for the large weight. 
Didn't think of that. I was only thinking of the input transformer - 
which appears to be an external brick. Didn't take into account the 
output transformer(s).

Sebastian

On 02/11/2011 01:59 PM, Andrew Bates wrote:
> my guess for the weight would be the required electronics to convert the
> battery's voltage to upwards of 19 volts?
>
> On 11 February 2011 13:56, Sebastian <shop at open-t.co.uk
> <mailto:shop at open-t.co.uk>> wrote:
>
>     Anybody here has any experience with these universal batteries (or
>     similar):
>
>     http://cgi.ebay.co.uk/Universal-External-Battery-most-laptop-/130481566861?pt=UK_AudioTVElectronics_Video_DVDPlayers_Recorders&hash=item1e614eb48d
>     <http://cgi.ebay.co.uk/Universal-External-Battery-most-laptop-/130481566861?pt=UK_AudioTVElectronics_Video_DVDPlayers_Recorders&hash=item1e614eb48d>
>
>     At 75Wh - two of them should give me 10 hours of work on my laptop
>     (and a hernia from carrying them :-) ). If anybody has one of these
>     - I'd be interested to hear how they fared.
>
>     Also - I don't understand why does it have to weight 1.5Kgs. My
>     laptop battery is 57Wh - and the whole laptop barely weighs 1.5Kgs.
>
>     Thank you,
>
>     Sebastian
>
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