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A Guide to the Use and Maintenance of Valve-Regulated Sealed Lead Acid Batteries

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A Guide to the Use and Maintenance of Valve-Regulated Sealed Lead Acid Batteries

A Guide to the Use and Maintenance of Valve-Regulated Sealed Lead Acid Batteries

November 20, 2023


Valve-regulated sealed lead acid (VRLA) batteries are widely used in various applications, ranging from backup power systems to renewable energy storage. In this blog post, we will explore the benefits of VRLA batteries, their common uses, and provide tips for their proper use and maintenance.

1. Understanding VRLA Batteries:

  • VRLA batteries are a type of lead acid battery that utilizes a valve-regulated design to maintain the electrolyte inside. This design eliminates the need for adding water and allows the battery to operate in any position. VRLA batteries are generally maintenance-free and sealed, making them safe and easy to use.

2. Common Applications:
VRLA batteries find extensive applications in several industries:

  • Backup Power Systems: VRLA batteries are commonly used as backup power sources for telecommunication systems, UPS (uninterruptible power supplies), and emergency lighting, etc.
  • Renewable Energy Storage: VRLA batteries can store energy generated from solar panels and wind turbines, providing a reliable power supply during low generation periods.
  • Mobility and Transportation: VRLA batteries are used in electric vehicles, golf carts, and other mobility devices due to their compact size and maintenance-free operation.

3. Tips for Use and Maintenance:
To ensure the longevity and optimal performance of VRLA batteries, the following maintenance tips should be followed:

  • Charging: Always use a charger specifically designed for VRLA batteries and follow the manufacturer's instructions. Overcharging or undercharging can reduce battery life.
  • Temperature: VRLA batteries perform best within a certain temperature range. Avoid exposing them to extreme temperatures, as it can affect battery performance and lifespan.
  • Cleaning: Regularly clean the battery terminals and connections with a damp cloth to remove any dirt or corrosion. Ensure a tight and secure connection.
  • Safety Precautions: When handling VRLA batteries, wear appropriate protective gear, such as gloves and goggles. Avoid short-circuiting the battery terminals and prevent exposure to flames or sparks.

4. Troubleshooting:
If you encounter any issues with your VRLA battery, here are some common troubleshooting steps:

    Storage Temperature Charging Interval
    0℃ to 20℃ (32℉ to 68℉) Every 9 months
    21℃ to 30℃ (70℉ to 86℉) Every 6 months
    31℃ to 40℃ (88℉ to 104℉) Every 3 months
  • When batteries are installed in a product, the following precautions to avoid over discharge during storage must be taken: 1. Only new or freshly recharged batteries should be used. 2.Any load that is on the battery in the product must be FULLY DISCONNECTED. 3.The first operating instruction for equipment fitted and sold with a rechargeable lead acid battery must be "The battery must be fully charged before use".
  • Charging instructions: 1. Always recharge the battery immediately after use. 2. Constant voltage charging is recommended. At 25℃, 2.27-2.30vpc for float use and 2.40-2.45vpc for cycle use. 3. The maximum initial charging current should be 0.4CA.
  • Discharging instructions: 1. Never leave a battery in a discharging condition. 2. Never allow a battery to fall below 2vpc in storage. The full capacity may not be able to reached and actual service life decreased. 3.Maximum continous discharge current is 5CA. For greater continous discharge current please consult our technical staff.


Valve-regulated sealed lead acid batteries offer a reliable and maintenance-free power storage solution for various applications. By following proper use and maintenance practices, you can ensure the longevity and optimal performance of your VRLA batteries. Remember to consult the manufacturer's guidelines and seek professional help when needed.

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