Hi! I have a big problem. My SPB switched off AC after charging to 100%. And now it happens every time. And then it doesn’t want switch on at all some period of time. And last time it switched off, then I again turn in AC and after hour it again turned off AC in UPS mode. Now it could turn off in every moment in UPS mode. So I can’t use it for my needs. I choosed this device only because it has UPS mode, but it doesn’t work. Please help! I have often blackouts and UPS needs me for my work((( It’s a disaster for me!