Front-access Valve-regulated Lead-acid battery is designed for the service with high requirement, since its grid is made of special multi-element alloy, the cell has a longer deep cycle life and a better discharge performance being a preferential solution for high-class UPS. These series are of a narrow and long structure with a proportion of length to width up to 3.59i << 5.00, therefore they have an excellent performance in heat dissipation reducing greatly possible thermal runaway. With the front terminal designed for the connection with external circuit and the availability of different connection bars, the batteries can be mounted and dismounted easily and quickly lowering the cost of maintenance. Products are suitable for service in telecom, UPS, power plant, transformer substation, control system, microwave relay station, remote sensing device, energy storage of solar/ wind power generator.