I bought two US brand 6-volt batteries, supposedly equivalent to two Trojan T-105's for $99 apiece. They seem to be working fine in my basic setup with PD-9245 converter charger. Price golf cart batteries in your area using Google. I also installed a Trik-L-Start to keep starting battery up while rig is parked and connected to 120vac power. The PD 9245 has an LED dongle that shows what mode the charger is working in. Keep all connections clean and electrolyte levels above plates. Don't leave batteries discharged for long periods. Invest in a bulb-type battery filler, voltmeter and a hydrometer to monitor and maintain batteries.
