Schools limit the power supply power how to buy UPS

According to your situation, just go to the electronic city and so on to buy a 500W small power backup UPS (backup time 5-10 minutes), the current price of Santak is very market-oriented. If it is the number of power outages, such as a night 10 times, then it is more difficult to do, because the UPS battery charging is not so fast. Students, buy a more than 100 points on the can, enough