VISION lead-acid battery 6FM120DX with 12V and 120Ah

The Vision 6FM120DX is a cycle-resistant, valve-regulated lead-acid battery (VRLA) with 12 volts nominal voltage and 120 ampere hours capacity. It is specially designed for demanding applications with recurring charging and discharging cycles. Equipped with the AGM technology (Absorbent Glass Mat), this battery offers a reliable, leak-proof and durable power supply. It is the ideal solution for systems that require high cycle stability and deep discharges, and is ideal for both cyclic and standby operation.

Highlights at a glance

• Cycle-resistant: Designed for a high number of charge and discharge cycles, significantly extending the life compared to conventional VRLA batteries.
• High capacity: 120 Ah at 12 V for a long-lasting and stable power supply.
• Maintenance-free: Thanks to the leak-proof AGM technology.
• Low self-discharge: Only approx. 3% capacity loss per month at 20°C, which allows long-term storage.
• Flexible installation: Operation is possible in different positions, except for permanent overhead mounting.
• Durable: A service life of up to 10 years in design life.

High performance for cyclic applications

The 6FM120DX reliably delivers power in recurring discharge cycles. With a capacity of 120 Ah at a 10-hour discharge, this battery is an excellent choice for mobile applications and systems with high energy requirements. Its special construction, which utilises lead calcium tin alloys, enables high cycle stability and excellent recovery after deep discharge.

Robust technology for demanding environments

Thanks to the VRLA technology with AGM system, the 6FM120DX is absolutely maintenance-free and leak-proof. The electrolyte is securely bound in a glass fibre mat, which enables safe handling and operation in any position. The battery features self-closing low-pressure relief valves that ensure pressure equalisation within the cells. The case is made of robust ABS plastic, which is optionally also available in a flame-retardant version (UL94:V0). The low self-discharge rate of about 3% per month allows long-term storage while maintaining high readiness for use.

FAQs about the VISION 6FM120DX Lead Battery 

For which applications is the 6FM120DX best suited?

This battery was specially developed for cyclic applications where the battery is regularly discharged and recharged. It is ideal as a main power source for electric vehicles such as wheelchairs, cleaning machines, golf caddies and for use in solar systems, telecommunications systems, UPS systems and medical devices.

What does "cycle-resistant" mean?

A cycle-resistant battery is specially designed to withstand a high number of charge and discharge cycles without significantly losing its capacity or lifespan. This distinguishes it from conventional lead-acid batteries, which are designed more for standby operation.

How do I charge the battery correctly?

We recommend using a charger that is designed for AGM batteries with a capacity of 120 Ah. Pay attention to the charging voltages recommended by the manufacturer: for buffer charging (float mode) 13.6 V to 13.8 V and for cyclic charging (boost mode) 14.4 V to 14.7 V. A charging current higher than 36 A can shorten the battery's lifespan.

How long does the 6FM120DX battery last?

The expected lifespan of the battery is up to 10 years at 20°C in design life. However, the actual service life depends heavily on individual operating conditions, depth of discharge, and ambient temperature. For example, with 50% depth of discharge, more than 650 cycles can be achieved.