Keeping your home safe starts with having a reliable smoke detector, but even the best smoke detectors need high-quality batteries to function properly. With so many battery options available, it’s crucial to choose one that ensures long-lasting performance and reliable power to keep your smoke detector working when it matters most.
In this guide, we ranked and reviewed the 7 best batteries for smoke detectors in 2025, along with our top 2 choices, so you can pick the best one for your needs.
Our Top Picks:
Which Smoke Detector Batteries Are the Best?
Smoke detector batteries are essential for powering your smoke alarms, ensuring they can alert you during an emergency. Even hardwired detectors often rely on batteries as backup power. Without functional batteries, smoke detectors may fail, putting your home and family at risk.
The main benefit of using high-quality smoke detector batteries is the assurance that your alarm will work when needed. These batteries offer extended life, reducing the need for frequent replacements, and provide reliable power to keep your home safe from fire hazards.
Before buying smoke detector batteries, consider the battery lifespan, brand reputation, and compatibility with your device. Opt for long-lasting lithium batteries for extended use or alkaline batteries for affordability. Also, ensure the battery fits your specific smoke detector model for seamless performance.
To create this list of the best batteries for smoke detectors, we thoroughly researched top-rated options by analyzing customer reviews, expert recommendations, and key factors like battery life, reliability, and compatibility with various smoke alarm models. Each battery was evaluated for its long-term performance, ease of installation, and overall value to ensure we only recommend the most dependable choices.
Related: The 7 Best Carbon Monoxide Detectors of 2025
Best Long-Lasting Smoke Detector Batteries
Duracell Coppertop 9V Battery
Pros:
- Long-lasting power for continuous device performance.
- Trusted brand known for dependability.
Cons:
- Slightly higher price compared to other generic brands.
The Duracell Coppertop 9V battery offers long-lasting and dependable power for a variety of household devices. Designed to deliver optimal performance, this alkaline battery is ideal for smoke detectors, remote controls, flashlights, and other portable electronics.
Key Features:
- Guaranteed 5-year storage life for emergency readiness.
- General-purpose battery suitable for a range of everyday devices.
- Built with Duracell’s high-quality assurance, ensuring durability and reliability.
Best Durable Smoke Detector Batteries
Energizer MAX 9V Batteries
Pros:
- Long-lasting power with up to 5-year shelf life.
- Environmentally conscious with recycled materials.
Cons:
- Slightly higher cost compared to generic brands.
Energizer MAX 9V batteries provide reliable and long-lasting power for everyday devices, including smoke detectors and safety devices. Designed to prevent leaks, these alkaline batteries ensure consistent performance and durability.
Key Features:
- Holds power for up to 5 years in storage.
- Contains up to 4% recycled materials.
- Leak-resistant design for enhanced safety.
Best Resistant Smoke Detector Batteries
Rayovac High Energy 9V Batteries
Pros:
- Long-lasting power with extended shelf life.
- Affordable price compared to other premium brands.
Cons:
- May not last as long in heavy-duty devices.
Rayovac High Energy 9V batteries provide reliable power for high-demand devices like smoke detectors, clocks, and toys. Engineered for durability, these batteries are tested twice to prevent leaks and ensure performance.
Key Features:
- Holds power for up to 5 years in storage.
- Leak-resistant design tested twice before shipping.
- Ideal for high-use devices such as smoke detectors and clocks.
Best High Energy Smoke Detector Batteries
TENAVOLTS Rechargeable Batteries
Pros:
- Fast recharge time compared to traditional rechargeable batteries.
- Eco-friendly with 1,000 recharge cycles, reducing battery waste.
Cons:
- Requires a unique charger, limiting compatibility with standard chargers.
TENAVOLTS rechargeable AA batteries provide high-capacity power, making them ideal for devices with high energy demands such as insulin pumps, toys, and portable audio players. Designed with advanced technology, these batteries ensure constant voltage and rapid recharging.
Key Features:
- 2775 mWh high-capacity batteries for powerful performance.
- Fully recharges in just 1.8 hours.
- Delivers constant 1.5V from 100% to 0% charge.
- Rechargeable up to 1,000 cycles for long-term use.
- Requires Tenavolts-specific charger for optimal recharging.
Best Long-Lasting Smoke Detector Batteries
Amazon Basics 9 Volt Batteries
Pros:
- Long-lasting power with a 5-year shelf life.
- Affordable and reliable for everyday devices.
Cons:
- Not rechargeable, requiring regular replacements for heavy use.
Amazon Basics 9-volt alkaline batteries deliver dependable power for various household items, including smoke detectors, garage door openers, and toys. Designed with a long shelf life, these batteries ensure readiness for emergencies or immediate use.
Key Features:
- 5-year leak-free shelf life for long-term storage.
- Ideal for a range of devices like smoke detectors and radios.
- Certified Frustration-Free Packaging for easy use and storage.
Best Versatile Smoke Detector Batteries
Tenergy 9V Lithium Batteries
Pros:
- Long-lasting power, perfect for long-term storage and backup.
- Wide temperature range for versatile use indoors and outdoors.
Cons:
- Not rechargeable, requiring new batteries once depleted.
Tenergy 9V lithium batteries offer 2.5 times the power of traditional batteries, making them ideal for smoke detectors and other long-term backup devices. With low self-discharge, these batteries maintain performance even after years in storage.
Key Features:
- Provides up to 10 years of power for backup in smoke detectors.
- Ultra-low self-discharge rate of only 2% per year.
- Rounded edges ensure a wider fit in most 9V devices.
- Operates reliably in extreme temperatures from -4°F to 140°F.
Best Reliable Smoke Detector Batteries
JESSPOW 9V Rechargeable Batteries
Pros:
- Long-lasting power with over 2000 charging cycles.
- Convenient USB-C charging eliminates the need for additional chargers.
Cons:
- Not compatible with certain guitar models.
JESSPOW 9V rechargeable lithium batteries deliver reliable power, ideal for high-drain devices such as smoke detectors, microphones, electric guitars, and home security systems. Designed with advanced technology, these batteries offer a high capacity and fast charging capability.
Key Features:
- 2000+ recharge cycles for extended battery life.
- Built-in USB-C charging port with LED status indicator.
- Environmentally friendly with mercury-free, lead-free materials.
The Bottom Line
Choosing the best battery for smoke detector is crucial for ensuring your home’s safety. With long-lasting power, reliability, and compatibility being key factors, selecting the best battery for smoke detector can save you from frequent replacements and guarantee that your smoke alarm will work when you need it most.
Whether you opt for lithium or alkaline, the batteries in this list offer the perfect balance of performance and durability. Prioritize your peace of mind by investing in a high-quality battery that keeps your smoke detector running smoothly for years to come.