The D cell, or Type D battery, is a large standard cylindrical battery measuring about 33 millimeters in diameter and about 61 millimeters in length.
These dimensions are defined by international standards and apply across common chemistries such as alkaline, carbon-zinc, NiMH rechargeable, and lithium primary types. While the footprint remains the same, the nominal voltage and rechargeability vary by chemistry.
Physical specs
To help you identify a replacement and ensure compatibility, here are the core measurements that define a D cell's footprint.
- Diameter: approximately 33.2 millimeters (about 1.31 inches)
- Length: approximately 61.5 millimeters (about 2.43 inches)
- Shape: cylindrical with a positive end cap and a flat negative base
Note that there is little variation in the standard size across manufacturers; the most common tolerances keep within a few tenths of a millimeter.
Chemistries and practical notes
Different chemistries used in D cells affect voltage, rechargeability, and performance in devices such as flashlights, radios, and toys.
- Alkaline and carbon-zinc D cells: typically 1.5 volts, non-rechargeable
- NiMH D cells: typically 1.2 volts, rechargeable
- Lithium primary D cells (e.g., LiFeS2 variants): typically 1.5 volts, non-rechargeable
Always ensure your device supports the chosen chemistry and follow safety guidelines for charging, use, and disposal.
Summary
The Type D battery is one of the largest standard cylindrical cells, with a footprint of about 33.2 mm in diameter and 61.5 mm in length. It supports several chemistries, most commonly 1.5V primary types and 1.2V rechargeable NiMH, making it versatile for high-drain devices. Check your device's battery compartment and manufacturer guidance when replacing.
What kills batteries faster?
Than the wire. Charging. As we saw before heat accelerates your battery aging the latest independent tests show wireless charging can degrade your battery up to 30% faster than the wire charging.
Are all D batteries 1.5 V?
The standard voltage of the three main battery types AA, AAA, D Types is about 1.5 Volts. As long as their physical dimensions and shapes are ignored (for a while), their consistent voltage allows them to be used across various device types.
Are there two types of D batteries?
D Battery Types
Alkaline and Lithium have their rechargeable alternatives, as in the case of RAMs and Lithium-ion or rechargeable Lithium. Nickel Metal Hydride (NiMH) and Nickel Cadmium (NiCad) are rechargeable batteries with nominal voltages and other characteristics pre-determined by their specific battery chemistry.
How big is a size D battery?
The standard size of D battery is: Diameter: 33.2 mm/1.3 inches. Length: 61.5 mm/2.42 inches.