I think my hybrid battery is going out, any advise?

I recently, while at a roundabout, had my Prius beep at me telling me to check the Hybrid System. But this didn't appear to be it, because while I got the typical P0A80 code, I also got some strange C1259 and C1310 codes as well. The remedy so far has been to disconnect the fuse box, and reconnect it after 10 min and it'll work for another 50-100 miles or so, but I figured I'd post this here and ask you guys - Is it just a hybrid battery, or maybe something more, and then comes the question: Is my "fix" going to damage the car?

 

I have not, I’ll try that and get back to you!