Starting Truck?

I've tried several times in the last month to start the truck.  I hooked the charger to the battery several times. Today. I put the charger on for about five hours.  Tonight, I tried to start the truck, there was not a bit of charge in the battery.  I put the charger and extension cords away.

I mowed the grass in the west end of orchard with the cordless weed eater until the battery died.  I put it back one the charger. After supper I cut more grass.

There is a floral arrangement of beautiful tulips.  I watered most of the plants in greenhouse five.