My 2012 310DA has been in my boat...

[old_timer]

My 2012 310DA has been in my boat lift for 20 days without power.  

1- On the assumption that the batteries are dead,  is the solution to simply plug in power and wait a few days for battery chargers to restore batteries?

2-is it possible the batteries not dear after that length of time?

[Midnight_Run]

Check water levels in all batteries if lead acid maintenance batteries and fully charge before attempting to start any engine. A dead battery should recharge in 4 to 6 hours with a 45amp charger.

[old_timer]

Midnight run. Thanks. Just got back and everything worked fine. Measured them. Just out of curiosity, and they all measured 12.80/12.90.