[Arthur Alchin (Arthur Alchin)]

I have a sony Vaio laptop (Athlon 1800+ cpu) which i want to use in the field for running my Meade DSI. The 240VAC transformer steps down to 19.5vdc at about 5amps.

I have 12v adaptor kit to run off cig plug in car but also have 2x 18amp/hr jump starters with aux cig lighter type outputs.

I will use one of these to drive my GOTO on meade but the one for the laptop dries up pretty quick.

Has anybody got any ideas how to extend the llife of the power pack. The laptop is very sensitive to voltage drops and starts to behave in a bizaar fashion in the presence of same.

I would consider running laptop off car but am scared of being battery dead and unable to go home from field work.

All replies will be read with great interest, i love receiving advice from anybody

Arthur