I have a cordless Black and Decker GRC840 lawnmower that needs a replacement
battery (12V; 28A). The price I have been quoted by a B & D "approved"
supplier is GBP150 which to my mind is excessive. A similar generic battery
costs about GBP40 but is not the correct size to fit into the mower. Has
anyone had to replace one of these batteries? Any suggestions?

Thanks

Phil