Alpha offers two types of flooded lead-acid batteries, the AlphaCell OPzS and AlphaCell OGi. Flooded battery products are constructed with either lead antimony or lead selenium. Even though both batteries are designated lead acid, a small amount of antimony or selenium is added to improve the plate strength and improve electrical characteristics. Another common additive material is calcium. Calcium offers most of the same benefits as antimony and selenium batteries but is prone to decreased deep discharge performance and unpredictable plate growth. This is a common fault in sudden cell failure. Alpha flooded stationary batteries are used primarily in communications, UPSs, switchgear, emergency lighting, utilities and solar applications.

AlphaCell OPzS
The AlphaCell OPzS battery is a vented tubular positive plate battery. The positive plate is constructed using a tubular cell that is arranged from a series of vertical lead alloy "spines' resembling a comb. Lead oxide, the active material, is packed around each spine and is retained by woven glass fiber tubes and protected by an outer woven polyester sleeve. This design offers several inherent benefits including extended life due to positive retention of the active plate material. In addition, the OPzS battery design requires less watering than traditional lead antimony, provides excellent frequent charge/discharge cycling, and reduces shedding of active materials thus decreasing the chance of internal short circuits common in other lead acid cell types. The OPzS batteries are used in mission critical applications where discharges are likely to be both frequent and deep, including traditional applications commonly supported by the flat plate battery designs. These batteries are available in 6 to 12V multi-cell jars ranging from 50 to 300Ah and single-cell 2V jars ranging from 100 to 3000Ah. The OPzS batteries are designed for 20+years of continuous operation.

AlphaCell OGi
The AlphaCell OGi battery is a vented flat plate lead acid battery. Cells in this battery contain active material that is pasted on a current collecting lead alloy grid. The grid structure resembles the cross section of a honeycomb. The OGi delivers excellent power output for short discharges and is popular in UPS, switchgear, communications, transmission, power generation, switch tripping and closing, emergency lighting, and engine starting applications. The batteries are available in 6 and 12V multi-cell jars ranging from 50 to 300Ah and single-cell 2V jars ranging from 600 to 900Ah. The OGi batteries are designed for 20+ years of continuous operation.