How well to external laptop batteries perform?
I have a trip coming up next week and I'll be taking my laptop along. I'll be analyzing data from racebike onboard data recorders between track sessions, so about every 20-30 mins for a couple of days I'll have to grab the data and help figure out what changes to make to the bike. Cool, eh!? I'll be away from power outlets other than generators which I don't feel comfortable using, so I won't make it though the day with just the standard battery. I'm thinking of trying an external extended laptop battery for this trip, but I haven't tried any of them out other than reading the manufacturers' fluff. How well do they actually function in the field? Are they pretty durable? Oh, and are there any that stand out from the pack?