My L125 J D Mower just went dead the other day, It had nothing when I turned the key, Battery dead I figure, so I buy a 12v battery chager, I hook black to black and red to red and slow charge from wall outlet in house for near 10 hours. Nothing happening when I retry. There is little or no power to lights, mower is not ingaged, battery posts are clean and 20 amp fuse is OK. Where am I goi9ng wrong, what next. The mower is only about maybe 4/5 years old and only used on small garden.

Did you check the water in the battery?

Consider buying a new battery