Li-Po as soon as you can swing it. They make ALL the difference in the world. I'll never go back to Ni-Mh after the pleasure of Li-Po. I've already got a battery inbound. I should be up and flying by Sat. I just checked your link...about $10 less. Should have waited for you but it's too late now. I will be getting another in a month or so though. Having two batteries is awsome because it cuts down on waiting time. It takes 40 minutes to charge a pack. That's 40 minutes of pure he!! waiting.