Energizer Industrial EN522 9V Alkaline Battery

Reliable 9V power for safety and professional gear. The EN522 is a primary (non‑rechargeable) alkaline battery designed for consistent performance in low‑to‑moderate drain devices and routine maintenance programs.

Best for

• Smoke and carbon monoxide alarms
• Security systems, access panels, and sensors
• Multimeters and electrical testers
• Wireless audio (IFB/transmitters), guitar pedals (9V battery bays)
• Medical/diagnostic devices that specify 9V alkaline

When to choose it

• You need cost‑effective, dependable power for code and safety devices.
• Operating temperatures are within typical ambient ranges (about 0°F to 130°F / -18°C to 55°C).
• You buy in bulk for facilities, maintenance rounds, or emergency kits.

When to consider alternatives

• Lithium 9V: Longer runtime and better cold/heat performance; good for outdoor sensors or infrequent access points.
• NiMH rechargeable 9V: Best for frequent, high‑drain use (e.g., daily wireless transmitters) where you can recharge between uses.
• 10‑year sealed alarms: Use if your life‑safety devices call for sealed lithium cells instead of replaceable 9V.

Runtime and shelf life

Shelf life: Up to 5 years at room temperature (store in original packaging).

• Smoke/CO alarms: Typically 6–12 months; follow device guidelines and replace on low‑battery chirp.
• Wireless audio transmitters: About 4–10 hours, depending on model, RF power, and temperature.
• Multimeters/testers: Months to years with intermittent use.

Actual runtime varies with load, cutoff voltage, duty cycle, and temperature.

Key specs

Pros and cons

• Pros: Widely compatible; predictable performance; bulk-friendly packaging; leak‑resistant design.
• Cons: Not rechargeable; shorter runtime than lithium in extreme temperatures or high‑drain use.

Usage and safety

• Install with correct polarity; test alarms monthly.
• Do not recharge, disassemble, or short the terminals; keep the protective cap on until installation.
• Store at 50–77°F (10–25°C), dry, and out of reach of children; do not refrigerate or freeze.
• Do not mix old and new batteries or different brands in the same device.
• Remove batteries from devices not used for 3+ months; recycle where available.

Compatibility notes

Use in devices that specify 9V alkaline. If the manufacturer recommends lithium or rechargeable 9V for performance or warranty reasons, follow that guidance.

FAQ

Is the EN522 rechargeable?

No. It is a primary alkaline battery and must not be recharged.

How long will it last in a smoke alarm?

Typically 6–12 months, depending on the alarm model and ambient conditions. Replace on low‑battery chirp and follow local safety guidelines.

Is “Industrial” different from retail 9V batteries?

Industrial packs are optimized for bulk purchasing and facility use. Performance is comparable to quality alkaline 9V cells; consult datasheets for exact conditions and results.

Can I use it outdoors?

Yes, within the alkaline operating range. For very cold or hot environments, consider lithium 9V.

What size codes match this battery?

9V alkaline; IEC 6LR61, ANSI 1604A, commonly called PP3.