Energizer E522 Max (9V)

Energizer E522 Max (9V, Alkaline 6LR61)

The Energizer E522 Max is a 9V alkaline battery built for reliable, everyday performance in safety and professional gear. It’s a solid choice for smoke and CO alarms, wireless microphones, guitar pedals, multimeters, and security devices that require dependable, nonrechargeable power.

At a Glance

Chemistry	Alkaline (Zn/MnO₂)
Form factor	9V, PP3, IEC 6LR61, snap terminals
Nominal voltage	9 V
Shelf life	Up to 5 years (unopened, room temperature)
Rechargeable	No
Environmental	Mercury- and cadmium-free

When to Choose It

• You need a ready-to-use, maintenance-free 9V for alarms, test gear, or pro audio.
• Intermittent or moderate current draw (e.g., instruments, pedals, mics) where predictability matters.
• Emergency kits and spares that may sit in storage for months.

When to Consider Alternatives

• Very cold or hot environments: Primary lithium 9V performs better across extremes.
• High, continuous drain or daily use: Rechargeable NiMH 9V can reduce waste and cost over time (check device compatibility).
• Devices requiring specific chemistries/voltages: Some gear expects lithium or a higher nominal voltage; follow the device manual.

Expected Runtimes (Typical)

Actual runtime varies by device design, cutoff voltage, and temperature. Use these as planning estimates:

Device	Typical Load	Estimated Runtime
Smoke/CO alarm (standby)	Microamp-level	6–12 months; replace annually or at chirp
Wireless microphone	20–80 mA	3–10 hours; start events with a fresh battery
Guitar pedal	5–15 mA	30–80 hours
Digital multimeter	1–5 mA	50–300 hours

Pros and Considerations

• Pros: Reliable, widely available, leak-resistant design, long shelf life, predictable performance.
• Considerations: Not rechargeable; performance drops in extreme cold/heat; less runtime than lithium 9V in demanding uses.

Compatibility Notes

• Fits devices labeled for 9V, PP3, or IEC 6LR61 with snap connectors.
• For safety devices, many manufacturers recommend primary alkaline or lithium; avoid rechargeables unless specified.
• Do not mix new and used batteries or different brands/chemistries in one device.

Usage and Care

• Install: Match polarity to the snap terminals; ensure a snug connection.
• Maintenance: Test alarms monthly; replace the battery at least annually or at the first chirp/low-battery warning.
• Storage: Keep spares in original packaging in a cool, dry place; do not refrigerate or store loose with metal objects.
• Safety: Do not recharge, disassemble, or short the terminals. Tape terminals before disposal to prevent shorting.
• Disposal: Recycle where available; follow local guidelines.

Alternatives

• Lithium 9V (primary): Longer shelf life (often up to 10 years) and better cold-weather performance; higher upfront cost.
• NiMH 9V (rechargeable): Good for daily-use gear; typical nominal voltage 7.2–8.4 V and lower capacity than alkaline. Not recommended for smoke/CO alarms unless the device explicitly allows it.

FAQ

How long will it last in a smoke alarm?

Plan for about 6–12 months in most 9V alarm models. Replace annually or at the first chirp, and always follow the alarm manufacturer’s guidance.

Is the E522 Max rechargeable?

No. It’s a primary alkaline battery. Use a compatible rechargeable NiMH 9V and charger if your device supports rechargeables.

Can I store spares in my car?

Not recommended. Heat and cold accelerate self-discharge and can reduce service life. Store in a cool, dry indoor location.

Will it leak?

The E522 Max is designed to be leak-resistant, but any battery can leak if left installed after depletion, mixed with other chemistries, or stored improperly. Replace on schedule and remove depleted cells promptly.

What pack sizes are available?

Commonly sold as singles and multi-packs. Stock extras for alarms and event gear to avoid last-minute shortages.