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My 7ah battery crapped out so I got a new one. Just for fun, I decided to time how long the battery would power my H-Bird FF. I set the thing up so it would show me the voltage. It started out at at 13. something volts. After more than 24 hours the voltage was still showing at more than 12V. Based on my experience, that is still a nearly fully charged battery.
I turned the thing off but my guess is that with a healthy 7ah battery, you should be able to power most FF for as long as a couple of days without recharging.
This was far from a scientific experiment so your mileage may vary.
Bob
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