D
The largest common household cell at 1.5 V, standardised as LR20. Chosen for runtime rather than power.
- Voltage
- 1.5 V
- Chemistry
- Alkaline
- Size
- 34.2 × 61.5 mm
- Capacity
- 12000–18000 mAh
Specifications
| Type | Cylindrical |
|---|---|
| Chemistry | Alkaline |
| Nominal voltage | 1.5 V |
| Diameter | 34.2 mm |
| Height | 61.5 mm |
| Typical capacity | 12000–18000 mAh |
| Rechargeable | No |
| Also sold as | LR20, MN1300, AM1, R20 |
Equivalent batteries
These codes describe the same physical cell as the D.
Can I replace D with…
Cells that fit the same space but differ in chemistry or voltage.
Check before you swap. Batteries with similar dimensions are not always interchangeable with the D. Always verify voltage, chemistry and the requirements printed in your device manual before fitting a replacement.
D questions
What batteries are equivalent to the D?
The D is sold as LR20, MN1300, AM1. All of these describe the same 34.2 × 61.5 mm alkaline cell at 1.5 V.
Can I use a C instead of a D?
In many low-drain devices, yes — the sizes match. Check the voltage and chemistry against your device's requirement first, because a small voltage difference can matter in calibrated equipment.
How long does a D last?
A D holds a typical 12000–18000 mAh. Real runtime depends entirely on how much current your device draws and whether it is used continuously.
Is the D rechargeable?
No. The D is a single-use cell and should not be recharged.
Related batteries
Other cylindricals in the index.