Power source for laptop?
My "old" laptop is solid and reliable but the battery runs out after 30 minutes, which is quite normal.
What's the best idea of a portable power source to have 3 or 4 hours, bike engine off.
I've seen a "digital power device" in the car store, it's basically a rechargeable battery in a blue box with a meter on it, it should last at least 3 hours according to notice.
I'ts made to bump start a car or for camping purposes, it has a 12 cigar type outlet jack and can be recharged 12V or 220V, dimension is about 20 cm thick and 30 cm high, not very heavy, price is 80€.
It even incorporates a mini air compressor..
Is this a super gadget or could it be usefull to mount one at the side of the bike?
Any other ideas otherwise?