Duracell Coppertop D Alkaline (MN1300) — Practical Guide

Duracell Coppertop D alkaline batteries provide reliable 1.5V power for high-capacity devices such as LED lanterns, portable radios, toys, paper towel or soap dispensers, and megaphones. They are a strong choice for households, facilities, and emergency kits that need dependable performance with long shelf life.

When to Choose These Batteries

• Use if: Your device is used occasionally but needs long runtime per set of batteries (lanterns, radios, toys, dispensers).
• Use if: You want primary (single-use) convenience with long shelf life for emergency storage.
• Avoid if: You use the device daily or at high currents (consider true D-size NiMH rechargeables).
• Avoid if: You need reliable operation below freezing for long periods (alkaline performance drops in cold; lithium chemistries handle cold better).

Compatibility and Equivalents

Size D alkaline cells are also labeled as MN1300 (Duracell), LR20 (IEC), and 13A (ANSI). Use only in devices that specify D 1.5V batteries. Do not replace with 3.6V industrial lithium D cells (Li‑SOCl₂); these are not compatible.

Key Specs

Chemistry	Alkaline (primary)
Size / Codes	D / MN1300, LR20, ANSI 13A
Nominal Voltage	1.5 V
Typical Capacity	~12,000–18,000 mAh at low drain; less at high drain
Dimensions	Ø 34.2 mm × 61.5 mm (1.35 in × 2.42 in)
Weight	~135–150 g per cell
Shelf Life	Up to ~10–12 years when stored properly (check package for guarantee)
Operating Temp	About -20°C to 54°C (-4°F to 130°F), with reduced performance in cold

Actual capacity and runtime depend heavily on device current draw, cut-off voltage, and temperature.

Expected Runtime Examples

• 2-cell LED lantern (200 mA total): roughly 40–60 hours.
• Portable AM/FM radio (50–100 mA): roughly 120–250 hours on two cells.
• Motorized toy (0.8–1.2 A): roughly 3–8 hours on two cells.

These are ballpark estimates; your results may vary by device design and settings.

Alternatives

• Frequent or high-drain use: Choose high-quality NiMH D rechargeables and a smart charger. They reduce waste and cost over time.
• Cold-weather reliability: Primary lithium in D size is uncommon; if your device supports adapters, lithium AA (FR6) cells perform better in cold than alkaline, but only use adapters if approved by your device maker.
• Long-term remote sensors: Do not substitute 3.6V industrial lithium D cells for 1.5V devices; voltage and chemistry are incompatible.

Storage and Care

• Store in a cool, dry place at room temperature; avoid heat and humidity.
• Keep batteries in their packaging until use; do not carry loose with metal objects.
• Remove batteries from devices you will not use for several months.
• Do not mix old and new cells or different brands/chemistries in the same device.

Safety Notes

• Insert with correct polarity (+/−) and do not attempt to recharge alkaline cells.
• Do not short-circuit, crush, or incinerate. If a cell leaks, avoid contact and follow local cleanup guidance.
• Recycle or dispose of according to local regulations; many retailers offer collection bins.

Buying Tips

• 2–4 pack: Occasional home use (a lantern and a radio).
• 8+ pack: Facilities, classrooms, or emergency kits where multiple devices use D cells.
• Check your device manual for how many cells are required and whether alkaline is recommended.

FAQ

Are Duracell Coppertop D batteries rechargeable?

No. They are primary (single-use) alkaline batteries. For reuse, choose rechargeable NiMH D cells.

What does MN1300 mean?

MN1300 is Duracell’s internal code for a D-size alkaline battery. Equivalent designations are LR20 (IEC) and 13A (ANSI).

Can I mix brands or old and new batteries?

No. Mixing increases the risk of leaks and poor performance. Replace the full set with matching, fresh cells.

How should I store them for emergencies?

Keep unopened cells in a cool, dry place between 10–25°C (50–77°F). Avoid garages/attics that can overheat. Expect up to about 10–12 years of usable shelf life; verify the date code on the package.

Why does runtime vary so much by device?

Alkaline voltage drops faster at high current and in cold temperatures. Devices that draw less current (radios, clocks) run far longer than high-drain loads (motorized toys, high-output lights).