Hot swap power supply: A hot swap power supply can be replaced when the equipment is power-on and functioning normally. Two hot swap power supplies for a set, and they share quantities of supplying power equally. If one hot swap power supply of a set is out of order, it can switch to the other one to keep supplying power, and then you can replace the abnormal power supply.                                                                                                            
Digital power supply: A digital power supply helps users to test, monitor, control, and allocate each function or data, e.g., allocating off-peak power during parallel connections, mating with charging curves to design charging management software, or predicting the time of malfunction.