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.

Energizer Ultimate Lithium 9 Volt Battery

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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E£ 7900

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Description

⚡ Energize your essentials with unstoppable power!

TRUSTED LONGEVITY - Outlasts standard batteries to keep your devices running longer
BUILT FOR EXTREMES - Operates flawlessly from freezing cold to scorching heat
LIGHT AS A FEATHER - Ultra-lightweight at just 0.08 pounds for easy portability
READY FOR ANYTHING - Ideal for smoke detectors, gaming consoles, and high-tech gadgets
POWER THAT NEVER QUITS - Delivers a steady 9 volts for your critical devices

The Energizer Ultimate Lithium 9 Volt Battery offers superior 9V power with exceptional resistance to extreme temperatures, ensuring reliable, long-lasting performance in high-tech and critical devices like smoke detectors and gaming consoles. Lightweight and single-use, it’s engineered for professionals who demand durability and peace of mind.

Specifications

ASIN	B018N7YZL6
Amperage	1 Amps
Antenna Location	Smoke Detectors
Battery Cell Type	Lithium Metal
Battery cell composition	Lithium Metal
Best Sellers Rank	#102,682 in Electronics ( See Top 100 in Electronics ) #1,459 in Disposable Household Batteries
Brand	Energizer
Compatible Phone Models	battery powered toys, gaming consoles, high
Customer Reviews	4.7 out of 5 stars 2,350 Reviews
Global Trade Identification Number	00039800911568
Item Dimensions	32 x 13 x 19 millimeters
Item Weight	0.08 Pounds
Manufacturer	Energizer Batteries- Consumables
Model Name	ENR L522BP.H4 LITH 9V-1 EMOD
Model Number	L522BP
Number of Batteries	1 AAA batteries required. (included)
Number of batteries	1 AAA batteries required. (included)
Recommended uses for product	Smoke Detectors
Reusability	Single Use
UPC	039800911568
Unit Count	1 Count
Unit count	1 Count
Voltage	9 Volts

Reviews

C**A

Energía de verdad

La compré por sus características en cuanto a la alta resistencia a temperaturas tanto frío como para calor ... Espero también sea más durable que la batería Energizer Max que utilizo normalmente

11.08.2018

A**R

Good price

Light battery, good price, review say holds charge really well.

23.03.2026

H**R

Mit Abstand die beste Batterie

Die Beste, nicht mehr und nicht weniger. Kein anderer 9volt Block hält so lange.

8.11.2025

E**C

Super bonne

Très bien

16.05.2026

J**S

Excelente

Todo muy bien, compre esta bateria porque dura mucho mas que las alcalinas y no tienen el inconveniente de que derraman liquido.

21.03.2019

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E£ 7900

Duties & taxes included

In stock

Sold byAmazon EGYPTDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to EGYPT.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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