29 Jun
2018
29 Jun
'18
4:27 p.m.
The good news about buying a new unit, is new batteries. Any donated unit would have old or no batteries, you'd have to buy new ones for use. Typically gel-cell batteries are tens of dollars each plus tens of dollars shipping, bigger cost more. Your unit (reading the manual) probably uses three 12V 7Ah batteries; those are common enough, probably about $100 to replace. Probably replace every two-three years depending on how many times they get discharged (extended power failures). When they get cooked, they swell up, it's visible. Good luck! My $10 worth Herb Johnson -- Herbert R. Johnson, New Jersey in the USA http://www.retrotechnology.com OR .net