Are bat­ter­ies re­ally main­te­nance-free?

Canal Boat - - Back Cabin - TONY REPLIES…

I have re­cently re­placed my bat­ter­ies with ‘main­te­nance-free’ ones. Visu­ally they are no dif­fer­ent from the orig­i­nals with a screw­plug on top of each cell. Do I still need to check the elec­trolyte level from time to time?

via the web­site

Q

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