Kensington makes a 120W
universal adapter (33197) that does AC/DC/AIR in a very lightweight, thin unit. I use them, even the DC only one (which is very, very small) (33196) works also.
When used with the M1710, they charge the unit normally, but you cannot boot with the charger plugged in. The BIOS intercepts and warns you are not using a 130W. Once booted, plug in, and it charges fine. Your M1710 will run at the lower clock speed, though. Look on pricegrabber.com, get them as low as $34. You need a tip, available separately for $10 for the Dell, but you can also buy tips for almost any other electronic device!
The other option is identical to the Kensington, but is Duracell-branded, and is 130W. Get it at Dell.com. Cost is high.http://accessories.us.dell.com/sna/p...4&sku=A0514668
Since the Duracell unit is identical to the Kensington, but one is 120W and one is 130W, I wonder if the units are the same, but the tip Duracell supplies allows the charger to work at 130W?
It is my understanding the TIP determines the output of the charger to the particular device. So, why not have a special tip that says "Feed me 130W"?
In any case, they are great units.