[Skools Out]

I take all mine out every yr but as said do not put on concrete they will die in some instances permanently. I always take the 5 out of my jet ski's and 2 out of each boat so I have around 11 to 13 battery's out and put them in the basement on a wooden table. Check the levels in all and add acid if needed and also I drop 1 reg. asprin in each battery hole. Hook all together in parallel and hook up a 1.5 amp trickle charger that will automatic shut off at full charge and it keeps all the battery's up and good all winter. My jet ski battery's that are usually only good 2 yrs max usually last 4 to 5 yrs. Some of the boat battery's are 6 to 7 yrs old too. I usually try to rotate with 1 older and 1 newer in each boat.