Battery Energizer EN391/381P1

The Energizer EN391/381P1 is a small silver-oxide battery with a nominal voltage of 1.55 V and a typical capacity of 55 mAh. It is designed for compact electronic devices where stable low-current power is required and offers up to five years of shelf life under proper storage conditions.

Advantages

This Energizer watch battery provides stable voltage output and reliable performance for low-drain devices. Its compact dimensions make replacement straightforward in watches, calculators and similar compact electronics, while the silver-oxide chemistry delivers consistent discharge characteristics over the battery life.

Suitable for

• Wristwatches (analog and digital)
• Calculators and small desktop electronics
• Small medical devices, such as thermometers and glucose meters (if specified by the device manufacturer)

When it may not be suitable

This battery is intended for low-drain, compact devices; it is not designed for high-drain electronics or devices that require rechargeable cells. Devices with unusual voltage or high current demands may require a different battery chemistry or size.

Key specifications

• Chemistry: Silver-oxide
• Nominal voltage: 1.55 V
• Typical capacity: 55 mAh
• Physical type: Button/coin cell (small diameter, thin profile)
• Shelf life: Up to 5 years in proper storage conditions

How to use

Replace the depleted cell with a new Energizer EN391/381P1 ensuring correct polarity (+/−) orientation as marked in the device. Use a non-metallic tool or follow the device manufacturer’s recommended procedure to avoid damage. After replacement, verify device operation and dispose of the used battery according to local battery recycling regulations.

What to consider before purchase

• Check your device documentation for compatible battery types and polarity
• Confirm the physical size fits the battery compartment
• Ensure silver-oxide chemistry is acceptable for your device (non-rechargeable)

Usage recommendations

Store unused batteries in a cool, dry place away from metal objects. Do not attempt to recharge, short-circuit, puncture, or expose to fire. Follow local regulations for disposal and recycling of used cells.