Energizer N Size Batteries

Overview

Energizer N size batteries are compact 1.5 V alkaline cells used in specialty electronics where AA or AAA cells are too large. Also known as LR1 (IEC) or E90 (Energizer), they fit many penlights, laser pointers, medical instruments, electronic locks, and vintage gadgets that specifically call for “N” or “LR1.”

When to Choose N Size

• Use if your device explicitly lists N, LR1, or E90.
• Choose for compact devices that need a single 1.5 V cell or two cells in series (3 V).
• Avoid if your device requires 12 V A23, coin cells, or lithium-only types—these are not interchangeable.

Key Specs

Chemistry	Alkaline
Size / Standards	N size (LR1 / E90)
Nominal Voltage	1.5 V
Dimensions	Approx. 12 mm diameter × 30 mm length
Shelf Life	Up to 5 years (cool, dry storage)
Mercury	Mercury-free

Typical Uses and Runtime Expectations

• Penlights and compact flashlights: roughly 2–10 hours per cell depending on LED efficiency and brightness.
• Laser pointers: often 8–25 hours of intermittent use (output and duty cycle vary widely).
• Security and access devices: months of standby with brief activation.
• Vintage radios/cameras and instruments: runtime depends on original design and load—check the manual.

Actual runtime varies with temperature, device current draw, and duty cycle. Replace all cells together if a device uses more than one.

Pack Options and Buying Tips

• Occasional users: a 2-pack keeps a spare on hand.
• Frequent users or multi-device households: 4–12 packs reduce cost per cell.
• Teams and service pros: bulk boxes help standardize maintenance and minimize downtime.

Safety and Best Practices

• Insert with correct polarity; do not mix old and new cells or brands/chemistries.
• Do not recharge alkaline cells—risk of leakage or rupture.
• Store in a cool, dry place; avoid extreme heat, moisture, or metal-to-metal contact.
• Remove batteries from devices that will be stored long term to reduce leak risk.

Compatibility Notes

• Common equivalents: N, LR1, E90 (check the device label or manual).
• Not the same as: A23 (12 V), AAA, AA, or coin cells—even if they appear similar in size.
• Some devices require two N cells in series for 3 V; replace both at the same time.

Environmental and Disposal

Energizer N cells are mercury-free. Recycle used batteries through local drop-off programs or electronics recyclers. Do not incinerate.

FAQ

Are Energizer N batteries rechargeable?

No. These are non-rechargeable alkaline cells. Do not attempt to recharge.

What’s the difference between N (LR1) and A23 batteries?

N (LR1) is a 1.5 V alkaline cell; A23 is a 12 V stack of button cells. They are not interchangeable.

How long do they last in storage?

Up to 5 years in a cool, dry environment. Buy only what you can use within that timeframe.

Can I use a coin cell or adapter instead of an N battery?

Only if the device manufacturer specifies a supported alternative. Unapproved substitutions can damage the device or affect performance.

Why did my device stop working after replacing one battery?

If the device uses two N cells, replace both at the same time and confirm polarity. Mixing fresh and partially used cells reduces runtime and can cause leaks.