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

⚡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!

POWER THAT OUTLASTS - Lasts up to 20% longer in high-drain devices, keeping your tech running stronger, longer.
EXTREME WEATHER READY - Reliable performance from freezing cold to scorching heat (-40°F to 140°F) — your all-season power solution.
VERSATILE COMPATIBILITY - Perfect for smoke detectors, toys, remote controls, and high-tech gadgets — power your essentials effortlessly.
LEAK RESISTANT DURABILITY - Engineered with leak-resistant construction to protect your devices and ensure safety.
LIGHTWEIGHT LONG LASTING - Weighing just 1.28 ounces, these batteries store power for up to 10 years, ready when you are.

Energizer Ultimate Lithium 9V Battery delivers 20% longer life than standard alkaline batteries, performs reliably in extreme temperatures from -40°F to 140°F, and offers a 10-year shelf life with leak-resistant design—ideal for powering smoke detectors, toys, and high-drain devices with confidence.

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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€ 34.77

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In stock

Sold byAmazon FinlandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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