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CSBattery as one of the professional VRLA battery manufacture in Guang dong, China, we produce completion range of VRLA batteries, which include AGM battery, GEL battery, OPzV, OPzS, deep cycle battery, Lead Carton battery, front terminal battery, high discharge rate battery,  agm start-stop battery and so on. For our products, they are widely used for off-grid solar power System, wind energy system, UPS, telecom system, Lighting, security and communication system, golf carts, floor cleaning machine, leisure boats, Aerial Work Platform and so on.

  • Q: What is the capacity of the battery?
  • A: The capacity of the battery refers to the amount of electricity that the active material in the battery can participate in the electrochemical reaction is called the capacity of the battery, that is, the amount of charge that the battery can hold after charging. The unit is "Ah" (Ah) and 1 A (A). The current is discharged for 1 hour, and the capacity is 1 ampere hour (Ah). Assuming that the average current is 4A, the discharge time is 3 hours when the battery is discharged at the termination voltage of the battery, and the battery capacity is 12Ah (the discharge is not calculated here) effectiveness).

  • Q: What is battery internal resistance?
  • A: It refers to the resistance to the current flowing through the battery when the battery is working. There are two parts: ohmic internal resistance and polarization internal resistance. Large internal resistance of the battery will cause the battery's discharge working voltage to decrease and shorten the discharge time. The internal resistance is mainly affected by the battery material, manufacturing process, battery structure and other factors. Is an important parameter to measure battery performance.

  • Q: Can I fast charge my battery?
  • A: Fast charging is not recommended as it’s harmful for the battery.

  • Q: What are the reasons for the battery warming up during charging?
  • A: During the charging process of the battery, part of the electrical energy is converted into chemical energy, and part of the electrical energy is converted into thermal energy and other energy. It is normal for the rechargeable battery to heat up, but when the temperature is too high, you should check whether the charging current is too large or a short circuit occurs inside the battery.


  • Q: What is the battery's charge acceptance?
  • A: Under the specified charging voltage and current conditions, the amount of charge the battery accepts per unit time.

  • Q: What is the harm of the battery heating?
  • A: The battery is allowed to have a small amount of heat, whether in use or during charging, but abnormal heat is not allowed. The abnormal fever is obvious, and you can feel it by touching the battery case with your hand. Heat is very harmful to the battery. The heat first causes the electrolyte water to evaporate and gradually dry up, and then decreases the charging efficiency, deformation of the plates, increased internal resistance, accelerated oxidation of mechanical parts, burned out plates or separators, and finally manifests in reduced battery capacity and shortened life.

  • Q: What is the danger if the connecting bolts are not tightened?
  • A: A loose connection will cause the resistance at the connection to increase, which will easily cause sparks during charging and discharging. In severe cases, it will cause heat and fire, and an accident will occur.

  • Q: How to maintain the consistency of the battery pack?
  • A: Although the lead-acid battery has been strictly selected when it leaves the factory, after a certain period of use, the non-uniformity will appear and gradually increase. The charger can't recognize or supplement the undercharge. How to balance the battery capacity? It must be performed by humans. The user measures the open circuit voltage of each battery periodically and irregularly during the middle and late periods of battery pack use. For lower voltages, recharge separately to make the voltage and capacity consistent with other batteries, and try to reduce their gap.

  • Q: Can I do a partial replacement of my batteries?
  • A: Partial battery replacement of lead acid battery banks is not recommended.

  • Q: Are you a battery manufacturer, and do you produce the plates by yourself ?
  • A: Yes, we are a professional battery manufacturer in Guandong province, China since 2003.  We  produce Lead plates by ourselves workshop.

  • Q: What are the 10-hour and 20-hour rates of VRLA Battery?
  • A: The 20-hour rate is just an index that is used in the battery industry to compare batteries of different types and sizes. The 20-hour rate is the amount of Ahs the battery will deliver during a 20-hour discharge. The capacity of a battery, in Ahs, is a dynamic number that is dependent on the discharge current. For example, a battery that is discharged at 10A will give you more capacity than a battery that is discharged at 20A. With the 20-hr rate, the battery is able to deliver more Ahs than with the 10-hr rate. Because the 20-hr rate uses a much lower discharge current than the 10-hr rate. Both rates are used as baselines in different parts of the world. Either rate, however, will give you the same view of a battery. A higher capacity battery will have higher 5 and 10 hour rates than a battery with lower capacity.


  • Q: Does your battery develop a memory?
  • A: Lead acid batteries do not develop any type of memory. This means that you do not have to deep discharge or completely discharge a battery before recharging it. For optimum life and performance, we generally recommend a discharge of 20 to 50% of the batteries rated capacity even though the battery is capable of being cycled to 90%.

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