1. What is the battery, and power sources?
　　DC and chemical energy can be transformed into each other and can discharge the charge to recover the repeated use of the device is battery. Commonly used batteries including lead acid, Ni-Cd, Nickel-hydrogen and Lithium-ion battery,The open circuit voltage of lead acid battery is 2.0V, open circuit voltage of Ni-Cd battery and Nickel-hydrogen battery is 1.2V, open circuit voltage of Lithium-ion battery is 3.6V.
2. Commonly used lead-acid batteries?
　　The end-use can be divided into Start-type, fixed, traction power and storage energy batteries
3. How to calculate the capacity of the lead acid battery?
　　Under the provided in conditions A fully-charged batteries’s power(Ah) capacity=Number of positive plates x capacity of single positive plate.
4.If Pure water can used of the battery?
　　No,as the Impurities in water is much higher than the battery electrolyte,battey electrolyte must match JB/T10053—1999 standard.
6. The main alloys of the lead acid battery.
　　Lead-acid batteries used in the manufacture of the main lead-antimony alloy, lead low-antimony alloy, lead and antimony alloy of lead calcium alloy.
7.The Charging methods of lead acid battery.
　　There are Constant current charge, Constant pressure limiting charge ,Constant voltage charge,Equalizing charge,Floating voltage charge and Pulse fast charge.
8.The connection between density of Lead acid battery electrolyte and open circuit voltage
　　open circuit voltage=0.85+ density of Lead acid battery electrolyte(Empirical formula).
9. Why fever when Lead-acid battery charging?
　　When battery charging Energy part of changes for the chemical energy, there are still some changes to heat and other energy, fever is normal, But when the high temperature should be promptly check whether the current charging too much or internal short-circuit the
battery,fever is less connetion with quantity of electrolyte. when less quantity of electrolyte  it will take the Increased internal resistance, Battery warming and Charging a high-voltage.
10. What is a floating charge and equalizing charge?
　　Floating charge: When the normal power supply disruption to the battery-powered circuit.the battery terminals always with the Constant voltage power supply to keep the battery full charged.Equalizing charge: Renewal charge of keeping every cell of battery full charging.
11.Why the temperature rise when fill the new electrolyte to the battery?
　　Temperature rise and internal factors related to the new battery,when fill the new electrolyte to the battery.dry battery.
12. How to judge the battery has sufficient power when Current limit by way of constant pressure VRLA battery charge?
There are two basis 1). Charging time lasting 18-24hours. 2). The charge current to the minimum and keep 3 hours unchanged.
13.The reasons of Plate of sulfuric acid?
1). Initial charge nadequate or last Disrupted of charge time.
2) .Lack of long-term rechargeable battery
3) . After the failure to discharge charge
4) . Often excessive charge or Small current deep discharge.
5) . Electrolyte high density or battery temperature is too high.
6) . Battery shelved a long time and do not Regularly charge.
7) . Electrolyte impure and self discharge.
8). Internal short circuit or Battery surface water leakage caused more.
9) . Low Level of internal battery electrolyte takes the plate the exposed part of the plate sulfate .
14.The requirements to store the battery in place.
　　Good ventilation, Drying (preferably with air conditioning),keep the temperature around 25℃, Stronger ground affordability,charge when Save three months.
15. The reasons for the battery leaked and Solution.Reason:
a) Sealant aging have led to seal the cracks
b) Heavy charged,mix using the difference model batteries, Poor gas efficiency of the battery.
c) False leakage.
16.How to fix when found the Inadequate capacity of the battery pack?
1) Equalizing charge the full battery pack in 18-24hours.
2) Added charged for the Inadequate capacity battery.
17. What is the meaning of Electric vehicle batteries 6 - DZM-10
　　"6" on behalf of composed by the six single-cells, "DZM" is "electric Bicycle sealed lead-acid batteries."
"10" that two hours rate the Nominal capacity is 10 AH;
18. What is difference between Electric vehicles sealed batteries and UPS sealed lead-acid batteries ?
　　The battery can be divided into deep cycle using and float using , deep cycle is fully charged then charging out of power, then power supplied by the battery; float using refers to the battery has always been connected to the power, the power charge a small battery to supplement the loss of electricity due to self-discharge of the battery and other reasons, once power out, the battery provide power to load. So UPS batteries is float using, and electric vehicles Battery is deep cycle using, they are different in formula and structure, and they can not be mutually interchangeable.
19. What is the difference between Gel batteries and sealed lead-acid batteries?
　　A: The electrolyte of the Gel battery is jelly, AGM battery is flow sulfuric acid, as thecolloidal unique physical and chemical nature, the performances as life safety and other areas of Gel battery are better than AGM batteries.
20. What is the harm of over discharge of the battery?
　　A: During the discharge process, the active substances of positive and negative electrode are gradually transformed into PbSO4 of great resistance and consumption of sulphuric acid electrolyte, form a large and hard PbSO4 crystal on plate easily, it is "Sulfate irreversible"  which will weaken the charge acceptance of battery and particularly hazardous.
21. What is the relationship between life of battery and initial capacity ?
　　A: The capacity of the battery impacted by the utilization of the active substance and the lead plate have been restricted to a certain extent due to the certain dimension of battery, board-level quality, only increasing the utilization of physical activity can increase capacity. To improve battery capacity, increase the rate of natural , the contenct of PbO2 content, the proportion of sulfuric acid, but these measures will accelerate the softening of positive plates, speed up the decay of the battery, active substances will have expansion and contraction during the process of charging and discharging (in particular the positive plates), deeper discharge, bigger expansion of active substances, accelerated softening more. Therefore, too large initial capacity directly impact on the number of battery charging and discharging, of course, the initial amount can not be too smal and should meet the use requirements.
22. High-voltage means high capacity ?
　　A: That is two concepts of battery voltage and capacity, voltage related to electrode materials and the concentration of electrolyte. Capacity is released by the electrochemical reaction of active material and related to the volume of active substance, reaction conditions and the use of Rate, connections. Therefore, we can not be said that higher voltage means higher capacity.
23. what is performance of Temperature impact on the battery ?
　　A: The higher temperature, increase the activity of the active substance of the cells, lower the viscosity of electrolyte, reduce resistance, electrochemical reaction easier, otherwise not easily. Discharge at the lower temperature, release lower capacity, on the contrary of high-temperature; lower temperature charging, poorer charge acceptance, the higher charge voltage required to be fully charged, on the contrary of higher temperature. The changement of the temperature directly impact on battery charge and discharge performance.
24 . what is the termination of the battery voltage ? How much is Termination of the battery voltage?
　　The termination voltage is the minimum voltage discharge to be repeated again under the conditions at 25 ℃. Different discharge rate, different termination voltage. The majority of termination voltage is 1.8 V /cell when 10 hrs rate discharge, 1.75 V /cell when 2 hrs rate discharge.