VHL 525-12FR

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Maintenance-Free Design

Using an Optimized oxygen circulation path design and a rational valve pressure setup for safety valve opening and closing, the oxygen generated in the battery charging process can be compounded promptly and efficiently, thus overcoming valve-controlled battery water loss and better guaranteeing battery service life

Low Self-discharge Rate

The adoption of high purity lead, calcium and tin alloys and the strict management of the production process to stop the inclusion of impurities have reduced the probability of side reaction and resulted in a monthly self-discharge rate of no more than 2%.

High Power Density

By adopting a computer-aided high power polar plate structure design with proper partitioning, the batteries exhibit more than 30% better high power discharge performance compared with conventional batteries in short-term backup power application

Strong Charge Acceptability

The optimized polar plate structure design in combination with a properly increased active substance specific area enable batteries to support 0.4CA high current charging and achieve a 90% recharge within 3 hours.

Excellent High Current Discharge Capability


The optimized battery polar plate structure and connection design effectively reduces the internal physical resistance of the battery, thus improving its ability to continously discharge high current.

Convenient Installation


The whole series of medium capacity batteries adopts an embedded terminal design, enabling more convenient battery installation and higher system reliability.

UL 94-V0 Grade Flame Retarding Material

The whole series of batteries uses ABS housing covers that conform to UL-V0 requirements and minimize the impact for customer of any serious risk.

Enviromental Friendliness

The ultra-high power batteries adopt pure lead expanded grid technology which greatly increases high rate performance while simultaneously saving on materials and reducing energy consumption in production, making it friendlier to the enviroment than conventional technology.

Long Life Design

Optimization of the alloy composition of battery polar plates and fine-tuning of the curing process and electrolyte parameters has effectively improved the theoretical life of batteries to as long as 12 years.


Self-discharging Characteristics
95 Self-discharging Characteristics
Float Charging Service Life Characteristics
95 Float Charging Service Life Character
Influence of Temperature on Float Charging Service Life
95 Influence of Temperature on Float Cha
Influence of Temperature on Capacity
95 Influence of Temperature on Capacity_
Characteristic Curve of Discharging (25°C)
95 Characteristics Curve of Discharging