Yes, what they said... replace both.
Have you thought about what your going to replace them with? Lead Acid or AGM?
How long do you plan on keeping your RV? If a long time I would recommend AGM's.
Brand preference?
I like the Full River brand.
I went with the Full River AGM 6 volts / 220 amp for my Axis and I love them.
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2017 Axis / 25.4: Big Foot Levelers, Aims 1200 Watt inverter, Ceramic Window Tint, Full River AGM 6V batteries, Front Hellwig Sway bar / Rear Track Arm, Safe T Plus Steering Stabilizer, PD 4655 converter, Hard Wired Surge Guard, WEboost + WiFi Ranger, LED Headlights/Driving lights, TPMS, Surge tank, Tornado flush, Viair Compressor
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