We did the WalMart thing on Dad's motorhome for a while, but replacing batteries twice a year got to be more hassle than it was worth. When it was only once a year, it was better, but lately, Wally World batteries have become too junky to even think about!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!