This is the SAME thing that is happening to me. Went to the beach, on the drive home it died, hasn’t charged since. I set it on the charger and it will say 0%, but never charge enough to power on. I took to best buy and they said I need to buy a new watch :(. Would also like to know if you think it is the battery or if the beach water could have fried the whole thing. I wouldn’t think it would since it occasionally will flash the 0% when try to charge it.