Duracell Procell Constant D Size Alkaline Battery (1 Pack)

The Duracell Procell Constant is a D size 1.5V alkaline battery designed for professional and industrial applications requiring steady, long-duration power. The cell provides consistent voltage output to low-to-moderate drain devices such as torches, portable radios, wall clocks, emergency backup lights and medical equipment that rely on D cell power.

Sold as a single battery rather than bulk packs, this format suits small-scale professional users, trades, facilities maintenance teams and home users who need to replace individual cells without committing to large quantities. The Procell range is Duracell's industrial line, positioned between consumer retail alkaline cells and specialist lithium cells, offering a balance of cost per unit and extended shelf life for professional stocking.

The alkaline chemistry provides approximately 15,000mAh nominal capacity at low continuous drain, with a 7-10 year shelf life when stored at room temperature. The cell weighs 140g and measures 61mm in height by 34mm diameter, fitting any standard D cell holder. The industrial-grade casing resists minor impacts and temperature variation better than consumer-grade alkaline cells, making the Procell suitable for site environments, outdoor equipment stores and backup battery compartments that may experience temperature swings.

What's the shelf life of the Procell D cell?

Duracell Procell alkaline batteries have a 7-10 year shelf life when stored at room temperature in the original packaging. This makes them suitable for emergency backup stock and infrequently-used equipment.

How does Procell differ from consumer Duracell batteries?

Procell is Duracell's industrial and professional range. The cells use the same alkaline chemistry but are packaged for bulk purchasing, longer shelf life and professional restocking rather than retail consumer use. Performance and capacity are comparable.

What devices typically use D size batteries?

D cells are common in high-capacity torches, portable radios, large wall clocks, emergency lighting, megaphones, some medical devices and older audio equipment. The larger cell size provides extended runtime in devices that draw moderate current over long periods.

Can Procell batteries be recharged?

No. Procell alkaline batteries are single-use primary cells and must not be recharged. Attempting to recharge alkaline cells can cause leakage, swelling or rupture.