Funny you should ask. I am just trying out how to run the laptop from a battery. I bought an inverter the other day, but I also went out and bought one of those 12v power supplies. I can tell you if your laptop battery is not up to scratch (mine was flat) it wouldn't get started. If it tries to charge the battery as well it falls over too. I'm currently running from the inverter, but it is not a high end sine wave inverted, so I'm not sure where I'm going to go from there.
Apparently a sine wave inverter starts around $200.00.
Cheers
Tony
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