According to a vendor, it is 750 mAh capacity; I use them for smoke alarms (hardwired installed) and haven't replaced one yet. Generally standard 9v batteries would die after a power outage, ive replaced them all with lithium no problems in since.

are these l522bp-2 the same as advance lithium l522 ?

Nope, different. "9V Ultimate lithium" are Energizer's current product. Energizer '9V Advanced lithium' has been discontinued so I'd bet that those are old stock. Be sure to check the expiration date. BP-2 just indicates there are two batteries in each individual package. No designation, A plain BP, or Bp-1 would indicate a single battery per package. BP4 would be a 4 pack, etc.

Life span in smoke alarms?

Lasted only 1 year 5 months in my smoke detector.

Is there any chance of these batteries used in a smoke detector exploding and causing a fire?

Virtually none. This type of battery constuction is by far the most stable of all common types. These are much safer and more stable than NiMH such as rechargeables or "standard" batteries which are generally Alkaline. I use these in any sensitive devices or devices not used often but important. As such I use these in my own smoke detectors and have never had any issue. For what it is worth I've been a FireFighter for 25+ years, so yes they are safe. The one thing to be aware of is that if your smoke detector is hard wired and requires a rechargeable battery as a backup power source then do not use these. These are not rechargeable batteries.

Deliver to Morocco

For best experience Get the App

DOWNLOAD THE APP

WE SOURCE ITEMS FROM

UAE
UK
India
USA
Japan
KOREA

Customer Services

About Us

Customer Support

Energizer Ultimate Lithium 9V Batteries (1 Pack), Lithium 9 Volt Batteries

Energizer Ultimate Lithium 9V Batteries (1 Pack), Lithium 9 Volt Batteries

Product ID: 21698714

Secure Transaction

Details

Number of Batteries
1 AAA
Brand
Energizer
Battery Cell Composition
Lithium Metal
Recommended Uses For Product
Radio
Unit Count
1.0 Count

⚡20% longer life vs MAX

🕒10 years shelf life

❄️🔥Works -40°F to 140°F

Description

⚡ Energize your essentials with unstoppable power!

POWER THAT OUTLASTS - Lasts up to 20% longer in toys than Energizer MAX batteries—stay ahead of the pack.
VERSATILE DEPENDABLE - Ideal for toys, clocks, and smoke detectors—power your essentials with confidence.
EXTREME TEMPERATURE READY - Reliable performance from -40°F to 140°F—no weather can slow you down.
LEAK RESISTANT DURABILITY - Engineered to prevent leaks, protecting your devices and your peace of mind.
LIGHTWEIGHT LONG LASTING - 25% lighter than alkaline batteries with up to 10 years of storage life—always ready when you are.

Energizer Ultimate Lithium 9V Batteries deliver up to 20% longer life in toys compared to Energizer MAX, operate reliably in extreme temperatures from -40°F to 140°F, and feature leak-resistant construction. These lightweight batteries hold power for up to 10 years in storage, making them perfect for toys, clocks, and smoke detectors that demand long-lasting, dependable energy.