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.

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Energizer Ultimate Lithium Battery

Q: 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.

Q: Life span in smoke alarms?

Lasted only 1 year 5 months in my smoke detector.

Q: 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.

Product ID: 733804844

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Details

Number of Batteries
2 Lithium
Brand
Energizer
Battery Cell Composition
Lithium
Recommended Uses For Product
Remote Control
Unit Count
1.0 個

⚡20% longer life

🛡️Leak-resistant & corrosion-proof

❄️🔥Works -40°F to 140°F

Frequently Bought Together

Energizer Ultimate Lithium 9V Batteries (2 Pack), Lithium 9 Volt Batteries

Energizer Ultimate Lithium AA Batteries Pack, 1.5V AA Batteries, 24 Count

Energizer AA Batteries, Ultimate Lithium Double A Battery, 8 Count

Description

⚡ Energizer Ultimate Lithium: Power that keeps pace with your unstoppable life!

POWER THAT OUTLASTS - Lasts up to 20% longer than Energizer MAX for uninterrupted performance.
EXTREME WEATHER READY - Operates flawlessly from -40°F to 140°F—your all-season power solution.
LEAK PROOF CONFIDENCE - Protects your devices with advanced leak-resistant technology.
DECADE LONG RELIABILITY - Stores up to 10 years without losing charge—always ready when you need it.
LIGHTWEIGHT VERSATILE - Ideal for toys, watches, and smoke detectors—power that fits your lifestyle.

The Energizer Ultimate Lithium 9V Battery delivers 20% longer life than standard batteries, performs reliably in extreme temperatures from -40°F to 140°F, and features a leak-resistant design. Lightweight and long-lasting, it can be stored for up to 10 years, making it the perfect power source for essential devices like toys, watches, and smoke detectors.

Specifications

Color Name	マルチカラー
Batteries Included	Yes
Batteries Required	Yes
Brand	Energizer
Item Model Number	30039800911576
Size	標準
Product Dimensions	1.78 x 9.4 x 11.43 cm; 68.04 g
Item Weight	68 g

Have a Question? See What Others Asked

what is the mah?

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

Life span in smoke alarms?

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

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