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.

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

Product ID: 316513149

Details

Battery capacity
9 volts
Battery cell composition
Lithium Metal
Brand
Energizer
Number of batteries
1 AAA
Recommended uses for product
Radio

⚡20% longer life vs MAX

🕒10-year shelf life

❄️🔥Works -40°F to 140°F

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Description

⚡ Energize your essentials with unstoppable power and reliability!

DECADE LONG BACKUP - Holds power for up to 10 years in storage—always ready when you need it most.
POWER THAT OUTLASTS - Lasts up to 20% longer in toys vs Energizer MAX for uninterrupted fun and work.
EXTREME WEATHER READY - Reliable performance from -40°F to 140°F keeps your devices running come rain, snow, or heatwave.
LEAK RESISTANT DURABILITY - Engineered with leak-resistant construction to protect your valuable devices over time.
LIGHTWEIGHT LONG LASTING - 25% lighter than alkaline batteries, reducing bulk without sacrificing power.

Energizer Ultimate Lithium 9V Battery delivers 20% longer life than standard alkaline batteries, performs flawlessly in extreme temperatures (-40°F to 140°F), and features leak-resistant construction. Lightweight and designed for long-term storage, it holds power for up to 10 years, making it the ideal choice for smoke detectors, toys, and critical devices.

Specifications

ASIN	B018N7YZL6
Amperage	1 Amps
Antenna Location	Radio
Battery Capacity	9 volts
Battery Cell Type	Lithium Metal
Battery Weight	250 Grams
Best Sellers Rank	6,017 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 616 in Disposable Household Batteries
Brand Name	Energizer
Compatible Phone Models	smoke detectors, remote control cars, toys, games
Customer Reviews	4.7 4.7 out of 5 stars (2,369)
Global Trade Identification Number	00039800911568
Included Components	Battery Pack
Item Dimensions	32 x 13 x 19 millimetres
Item Type Name	9v-batteries
Manufacturer	Energizer
Model Name	ENR L522BP.H4 LITH 9V-1 EMOD
Model Number	L522BP
Number of Batteries	1 AAA batteries required. (included)
Reusability	Single Use
UPC	039800911568
Unit Count	1.0 count
Voltage	9 Volts

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C$2101

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In stock

Sold byAmazon NicaraguaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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