Gauteng Generators

I bought an inverter and battery from this company two years ago. As a pensioner, I like to watch television and as load shedding is upon us once again, this is the whole point of the inverter. However the battery sold to me by Gauteng Generators gives me about 20 minutes of viewing time which is totally unacceptable. I used to get at least two hours with my old inverter. I would not recommend this company