Battery pack dead

After 3 1/2 years the battery pack couldn't make the 15 mile round trip to work anymore. I think I would have gotten more but last fall they tore up the road in front of work and rerouted it so I drove the truck to work for 6 months.

I'm thinking of going the LiFePo4 route with 60 - 180 Ah cells/ 192 volts.If anyone has a good suggestion as Ross Perrot said "I'm all ears"