If you simply look at the title, the problem is relatively simple, you know how much your UPS with batteries, use your UPS DC voltage (rectifier output voltage) divided by the rated voltage of a single cell can be, for example, the DC UPS voltage 380V, with 12V battery, then 380/12 = 31.6666, so generally it with 32 cells on it. But if you are wondering how to choose UPS battery backup time or according to different needs to choose the battery capacity, the problem is a little more complicated, if this is the problem, you need to provide a specific point of parameters, such as UPS capacity, DC voltage, the need to buy UPS battery back-up time of four small battery technology is uninterrupted power supply system is an important part of the value of time-lapse UPS battery system even more than the UPS host, so when the user selects the UPS system Be sure to pay attention to the battery brand choice, different brands of batteries whose performance may be very different. In general, you can determine the battery from the four aspects of the merits, buy the real high quality batteries Contact: KONG Wen-hua Tel: 13911961732 E-mail: 1651724804@qq.com