Tom, I thought those were " life time " batteries? When I got my Liberty I found out a couple of days prior to a trip to Atlanta that my house batteries were in very poor condition. $1500 later and six new L161 Trojan, @ 121 lbs ea., we headed for GA. I keep those babies watered weekly and keep an eye on charging rates from both the alt. and my Xantrex inverter / charger. Ken