This means that the battery is discharged down to 10.5 volts over a 20 hour period while the total actual amp-hours that it supplies are measured. Sometimes ratings at the 6 hour rate and 100 hour rate are also given for comparison and for different applications.
Pool meets are usually no more than 4 hours, but beach meets last about 7 hours. It depends how many events are in the meet. And then if it is a really big meet (like a tournament kind of) it can last days. Hope that helps.
What is the worlds longest underwater handstand? I don't know whether there's an official record, but we once had an underwater hadnstand contest in swimming practice where the winner could leave early. the coach said I stayâ¦ed underwater in my handstand for 1 minute 58 seconds.