Phoenix batteries due to the lack of effective equipment, traditional discharge test, the need to run out of battery, connect electric wires or water resistance discharge. Or by adjusting the water resistance heating wire, so that the battery pack at a constant current discharge, while the battery terminal voltage to be measured with a multimeter time intervals, until the terminal voltage of a monomer which reaches a predetermined discharge termination voltage is stopped, the discharge time and the product of the discharge current is the actual capacity of the battery. Such detection methods to accurately measure the value of the battery capacity, able to clearly determine whether the battery is dead battery. Since the load bulky, inconvenient transportation; enormous heat generated by the discharge, resulting in redness electric wire easily cause accidents; the test at least one measure of a person record data, work overload, difficulty in full swing; discharge near the end, the battery voltage drops rapidly, individual battery terminal voltage may suddenly fell twice during the measurement interval termination voltage, resulting in excessive discharge. (3) resistance (conductance) measurements VRLA battery failure, such as grid corrosion, bad, and so reduce the amount of active substance can be manifested in the battery internal resistance increases, the conductivity decreases and, therefore, conductance or resistance provides an effective level of a battery fault and information reflecting the degree of use. Method for detecting the internal resistance of the battery on a popular current international electric conductivity test to take to determine the capacity of the battery is indeed. Conductance, i.e., the reciprocal of the internal resistance, means ability to conduct current, which reflects the size of the resistor. The test method is injected to the battery using the AC power generator or battery pack a single low-frequency AC signal 20 ~ 30Hz or 60Hz, the AC current measured by the battery and the AC voltage across each battery, and then calculate the I / U or Uac / Iac ratio can be derived conductance or resistance of the battery, and displays this value. This test theory that the remaining capacity of the battery internal resistance and there is a certain fixed relationship, especially when the remaining capacity of less than 50%, will decline rapidly, thus conductance or resistance value according to the battery to determine the battery capacity has good consistency. However resistors VRLA batteries is complicated, * the role of a battery comprising the ohmic resistance, concentration polarization resistance, electrochemical reaction resistance and the double layer capacitance charging. Measurements at different time points and different resistance value of the measured composition contained also different. In addition, as is milliohm resistance level, so the connection cable, test fixture, the tester to measure the performance and so will have a greater resistance *, the authenticity and accuracy of the internal resistance of how to get security, which requires a lot of practice determined. There is no authority under national standards or recommendations will be confirmed resistance (conductance) measurement as a means of determining the auxiliary battery performance test. 3 Common test methods (1) on-line monitoring currently using more battery online monitoring device is battery data logging devices, collecting battery voltage, current and temperature, by monitoring the DC charging equipment can be displayed for each individual cell voltages, determine fault cell number and gives an alarm, and measure the characteristics of each cell internal resistance, which greatly facilitates the user's routine maintenance, improve work efficiency, guarantee the accuracy of the data acquisition and real-time. In addition, some manufacturers have introduced a portable conductivity tester, battery conductance can be measured in the battery running, determine the battery capacity change according to changes in conductance. This engineering and technical services staff is very convenient. (2) When the UPS battery capacity test and DC plate runs, exit to the battery or battery backup activation and check the discharge, the battery capacity can be used specialized test equipment. Battery charge and discharge currents, discharge termination voltage, single end voltage, charge and discharge time adjustable control, and can measure and record the entire monomers assembled battery voltage, resistance, the data acquisition period may be set to the second level, As long as the monomer termination voltage, the entire group termination voltage, charge and discharge time has reached a set value, the test device will automatically stop working to protect the safety of the battery. The new capacity tester uses the built-in discharge load, no previous bulky electric wire and red-hot phenomenon, which greatly facilitates the use of engineering and technical personnel on-site, eliminating the use of the old load on the environment and space requirements, the most important is the discharge process safety has been greatly Features Phoenix has many excellent features a battery, maintenance-free. 2, no leak. 3, low self-discharge. 4, can be used in a wide range of temperature. 5, long life. 6, high discharge design. Structure of single cells from the positive plate, negative plates, partitions, and terminals and provided with a safety valve. These components into the ABS casing, and with ABS cover. 1, plate: positive and negative plates from lead oxide coated lead calcium alloy grid made fast charging. 2, the separator: high durability fine glass fiber is used as a separator, can absorb electrolyte and ensures good electrical conductivity. 3, the safety valve: made of special rubber, when the internal pressure increased after the overcharge caused the gas too much, the safety valve can be opened. 4, the housing and the cover: the anti-acid and durability of ABS material, seal and prevent leakage. Phoenix discharge characteristics of a battery, the discharge time and the discharge current: battery capacity to time by the discharge current and end voltage of the product. 2, the effect of temperature on the capacity of: battery capacity affected by the ambient temperature and discharge rate, low temperatures can reduce the loss of capacity, on the contrary high temperatures can damage the battery life. 3, the use of lead-calcium grid can reduce all gold self-discharge, such as idle six months without use, the daily self-discharge of about 0.1% (20 ℃) ??The following table shows the charging time interval. 4, cycle life: the depth of discharge cycles affected, operating temperature and charging mode.