Ellies FBI2000W replacement batteries

Hi guys

A mate of mine has an Ellies FBI2000W inverter and the batteries need replacing, any idea what batteries are in there and where he could get replacements?

I’d imagine its a pair of 12V 100Ah but obviously need to make sure.

Thanks

There are sellers on Takealot selling the lead acid batteries these take.

Awesome thanks plonkster

Dixon batteries.