- MOQ 1 Piece(s)
- Brand NameBAYKEE
We are offering 12v7ah-200ah Sealed Maintain- Free Lead Acid Batteries for Ups. Lead-acid battery's characteristic(be applicable to FM, GFM, SW series) 1. Hermetic: Battery adopts extreme column with trough cover design to prevent missing acid, stable safety valve capable of outside air and dust get inside. 2.Maintenancefree: strong water regeneration capacity, hermetic high rate of efficiency response, then it is no need to supply water and acid maintenance. 3. Safety and reliability: No missing acid, stable safety valve auto closure, riot device to make baykee battery are safety and more stable during working procession. 4. Long service time design: Guarantee long usage of baykee battery with computer precision design to corrosion resistant alloy plate and lead calcium lead gate, ABS corrosion resistant material. 5. High performance: (1)Weight higher than energy, small resistance, highly input power rate. (2)High charge and discharge performance, self discharge control under 2% every month(20°C). (3Good recovery performance, it could use balance charging method to recover capacity in short circuit after 30 days while deeply discharge or the charger malfunction. (4Because of the good consistency of the internal resistance, capacity and float voltage, then it is no need to use balance charging method while under floating using state. 6. Strong temperature adaptability: Free from worried to use between -30°C~50°C. 7. Convenient to use and transport: Full charged to leave the factory, none liquid withstand the battery in any position to suitable for any requirement of sea and land transportation. 8. Economic and benefit: The baykee battery with high performance, long usage, lowest cost of maintenance to ensure user gained the best economic and benefit product. Battery discharge 1. Discharge to terminate voltage: Battery are not allow to discharger under scheduled terminate voltage, otherwise to cause over-discharge, and repeated over-discharge will cause hard to recover capacity, then to ensure the best working power and longest usage, discharging must control between 0.05~3°C. 2. Discharge capacity: (1) Relationship between discharge capacity and discharge current: Figure 1 is FM, GFM, JMF series batteries capacity under different kinds of discharge power, since to read the figure, the capacity of the battery can release smaller with greater rate of discharging. (2) Effect of Temperature: Battery capacity also effect by temperature, lower temperature(under -15°C5°F) to reduce effective capacity, higher temperature(over 50°C122°F) to cause lost control of heat-up and damage the battery. (as shown in Figure 2). Charge methods: FM, GFM, JMF series charge methods (1) Floating(restrict voltage, control current) use: Floating voltage 2.25V~2.30Vsingle, max current is not over 0.25C10, Battery floating current is adjust to less than 2mAAH(25 °C), shown in figure 3. (2) Recycling use(Charging stop, after discharge then charge again) Charging voltage is 2.4Vsingle, max charging current is no over 0.25C10, shown in figure 4. (3) Temperature compensation Chemical reaction accelerate with increasing temperature, and slow down with reduce temperature. When Battery is working between 5~35°C, it is no need to compensate charging voltage, When temperature under 5°C or over 35 °C, in order to prevent battery over-charge or owe charge, to adjust charging voltage in advise, adjustment of standard floating is -3mv°Ccell, recycling using is -4mv°Ccell(temperature basic in 25°C), shown in figure 5. (4)Charging time calculate: For the backup battery, the time of battery re-charging are not less than 24 hours, after battery full charged. For the recycling used battery, it could calculate the charging time according to below formula in 25°C if the previous discharging power and first charging current to be known. A. When discharging current >0.25C, Cdis Tch=I+3~5 B. When discharging current
shenzhen, China 
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