12v7ah Storage Lead Acid Battery, 7ah Alarm UPS Battery

12v7ah storage lead acid battery, 7ah alarm UPS battery We are Improve Battery Co.,Ltd leading manufacturer of rechargeable batteries since 2005. SLA batteries are CE RoHs MSDS approved .We are confident in providing you superb quality with competitive price ! Have interest in our products, pls send us your inquiry soon.   Specification: Battery knowledge  1) Don’t near the hot source and don’t under the sunshine.2 )Don’t charge in the sealed container.3) No short circuit. It should be addition charge if you don’t use, and single charge per three months, to avoid irreversible sulfating. 4 )Don’t store in the space of acid gas.You should be careful and regular check when use the battery. To avoid the battery don’t work. 5)Don’t put the battery in the fire, or it will explode.   FAQ: 1. What is the definition of "cycle use" and "standby use"? "Cycle Use" - direct power source: Cycle Use It can provide the power supply to power tools, and portable electronic products. It can also be used for cycling charging and discharging usage such as electronics motorbike or vacuum cleaner. "Standby Use" - back up power: Standby Use is mainly used for emergency power to avoid future damage that may be caused by a sudden power outage. 2. What are the concerns when using IMP batteries in a parallel or a serial series? 1. Do not mix brands, models and date codes? 2. No separate discharge then charging in a serial configuration. 3. Under parallel usage, pay close attention to the differences in voltage in each circuit. 4. If the difference in voltage in each circuit is too high, do not charge/discharge as parallel. 5. The environment of all circuits must be similar. 3. How can you check a battery’s performance? Different usage applications will use different methods for evaluating a battery’s performance. Using a 20 hour rate or the 10 hour rate, you can use 0.05CA or 0.1CA to discharge the battery until the battery reaches a terminal voltage of 10.25 volts. You can then calculate the amp hours to see if the battery fits the specifications or not. For a 5 minutes rate, such as the HC1221W, you can use a 21 watts/cell discharge till the terminal voltage reaches a terminal voltage of 9.6 volts and then measure the discharge time to see if it meets the final specifications or not. 4. How can the conversion be made between "watts (W)" and "amp hours (Ah)"? W=I x V = 4I (15 minute rate) = 2CV = 2V (Ex. HC1217W = 17/4 = 4.25Ah) 5. When should a deep-cycle battery be used? Deep-cycle batteries are used when 50% or more of the capacity is used per cycle. The most common use of deep-cycle batteries is in applications that require deep, repetitive drain, like powerful car audio systems, trolling motors, golf carts, electric wheelchairs, or RV house power sources. Public safety and high-performance vehicles are other applications that call for the special characteristics of deep-cycle batteries. 6. Does the deep-cycle battery have a "memory"? No. The performance of deep-cycle batteries will be reduced over time, but deep-cycle batteries do not suffer from "memory effect" such as NiCd batteries do.  7. How are batteries rated? Lead acid batteries are rated based on a capacity given in a defined time. There is not a set industry standard for how to rate a battery. 8. How long can a battery last? The service design life of a battery varies considerably with how it is used, how it is maintained and charged, temperature, among other factors. 9. Do I need to add water to my battery? No. Sealed lead acid batteries do not require the use of water. 10. What determines the life of a VRLA battery? Sealed lead acid battery life is determined by many factors. These include temperature, depth and rate of discharge, and the number of charges and discharges (called cycles). 11. What is the difference between float and cycle applications? A float application requires the battery to be on constant charge with an occasional discharge. Cycle applications charge and discharge the battery on a regular basis. 12. Does overcharging damage batteries? OVERCHARGING is the most destructive element in battery service. Usually the boater is not aware that this is occurring as he believes his alternator or battery charger is "automatic." Unfortunately, these automatic circuits are sensitive to voltage surges, heat, direct lightening strikes and indirect lightening electromagnetic influences and could fail or shift their calibration. When they fail, overcharging begins to affect the batteries. During overcharging, excessive current causes the oxides on the plates of the battery to "shed" and precipitate to the bottom of the cell and also heat the battery, thus removing water from the electrolyte. Once removed, this material (which represents capacity) is no longer active in the battery. In addition, the loss of water from the electrolyte may expose portions of the plates and cause the exposed areas to oxidize and become inactive, thus reducing additional capacity. Sealed batteries are not immune from the same internal results when overcharged. In fact, sealed recombination absorption and gel batteries are particularly sensitive to overcharging. Once moisture is removed from the battery, it cannot be replaced. Portions of the battery damaged due to overcharging are irretrievable. However, if detected early, corrective adjustments to the charging device will save the undamaged portion of the battery. Initial signs of overcharging are excessive usage of water in the battery, continuously warm batteries, or higher than normal battery voltages while under the influence of the charger. If overcharging is suspected, correct immediately.