Volkano wifi UPS is terrible

Guys do yourselves a favour, stay away from Volkano wifi UPS's. They promise 4 hours of operation when the lights go out, when it was brand new it only gave me 3h30mins, now it doesn't even get to 3 hours and it's only been 3 months. Volkano sold me a lie, please don't fall for the same trap. I'm bitterly disappointed...R800 down the drain.