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

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

Product ID: 21698714

Details

Battery Capacity
9 volts
Battery Cell Composition
Lithium Metal
Brand
Energizer
Number of Batteries
1 AAA
Recommended Uses For Product
Radio

⏳10-year shelf life

⚡20% longer life vs MAX

❄️🔥Works -40°F to 140°F

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Description

⚡ Energize your essentials with power that never quits!

DECADE LONG BACKUP - Store with confidence—these batteries hold power for up to 10 years, ready when you need them most.
POWER THAT OUTLASTS - Lasts up to 20% longer in toys than Energizer MAX batteries, so your devices keep going when others quit.
EXTREME WEATHER READY - Reliable performance from -40°F to 140°F means your gadgets stay powered no matter the season or adventure.
LIGHTWEIGHT COMPACT - Sleek 9V design weighing just 1.28 ounces fits perfectly in smoke detectors, remotes, and smart home devices.
LEAK RESISTANT DURABILITY - Built with leak-resistant technology to protect your devices and ensure safe, long-lasting use.

Energizer Ultimate Lithium 9V Battery delivers superior longevity and reliability with 20% longer life than standard batteries, extreme temperature tolerance from -40°F to 140°F, and a 10-year shelf life. Its leak-resistant design and lightweight form factor make it the go-to power source for toys, smoke detectors, smart devices, and more—ensuring your critical electronics stay energized through every season and moment.

Specifications

ASIN	B018N7YZL6
ASIN	B018N7YZL6
Amperage	1 A
Antenna Location	Radio
Batteries	1 AAA batteries required. (included)
Battery Capacity	9 volts
Battery Cell Type	Lithium Metal
Battery Weight	250 g
Best Sellers Rank	#1,873 in Health & Household ( See Top 100 in Health & Household ) #59 in 9V Batteries
Brand	Energizer
Compatible Phone Models	smoke detectors, remote control cars, toys, games
Customer Reviews	4.7 4.7 out of 5 stars (33,635)
Date First Available	November 2, 2015
Department	Unisex
Global Trade Identification Number	00039800911568
Included Components	Battery Pack
Item Dimensions	1.25 x 0.5 x 0.75 inches
Item Type Name	9v-batteries
Item Weight	1.28 ounces
Item model number	L522BP
Manufacturer	Energizer
Manufacturer	Energizer
Model Name	ENR L522BP.H4 LITH 9V-1 EMOD
Model Number	L522BP
Number of Batteries	1 AAA batteries required. (included)
Product Dimensions	1.25 x 0.5 x 0.75 inches; 1.28 ounces
Reusability	Single Use
UPC	039800911568
Unit Count	1 Count
Voltage	9 volts
Warranty Description	No Warranty

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€ 29.66

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In stock

Sold byAmazon PortugalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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