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

Product ID: 27498933

Details

Battery Capacity
750
Battery Cell Composition
Lithium Metal
Brand
Energizer
Number of Batteries
2 Lithium
Recommended Uses For Product
Camera

⚡20% longer life vs MAX

🕒10-year shelf life

❄️🔥Works -40°F to 140°F

KSh6311

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Description

⚡ Power that keeps pace with your hustle — anytime, anywhere.

UNMATCHED LONGEVITY - Outlasts standard alkaline by 20% for uninterrupted power in your devices.
DECADE LONG READINESS - Holds charge up to 10 years in storage—your ultimate backup for peace of mind.
LIGHTWEIGHT POWERHOUSE - 25% lighter than alkaline batteries, perfect for portable devices and on-the-go professionals.
LEAK RESISTANT DURABILITY - Engineered to prevent leaks, protecting your valuable electronics.
EXTREME TEMPERATURE RESILIENCE - Reliable performance from arctic chills to summer heatwaves (-40°F to 140°F).

Energizer Ultimate Lithium 9V Batteries deliver 20% longer life than Energizer MAX, operate flawlessly in extreme temperatures from -40°F to 140°F, and feature leak-resistant construction. These lightweight batteries hold power for up to 10 years in storage, making them the go-to choice for reliable, long-lasting energy in toys, tools, and professional devices.

Specifications

ASIN	B01684J7P0
ASIN	B01684J7P0
Antenna Location	Camera
Batteries	2 Lithium Metal batteries required. (included)
Battery Capacity	750
Battery Cell Type	Lithium Metal
Battery Weight	100 g
Best Sellers Rank	#15,540 in Health & Household ( See Top 100 in Health & Household ) #16 in 9V Batteries #1,379 in Sales & Deals
Brand	Energizer
Compatible Phone Models	L522BP2
Customer Reviews	4.7 4.7 out of 5 stars (5,871)
Date First Available	April 12, 2016
Global Trade Identification Number	00039800911575
Included Components	Battery Pack
Item Dimensions	0.7 x 3.7 x 4.5 inches
Item Type Name	9v-batteries
Item Weight	2.4 ounces
Item model number	30039800911576
Manufacturer	Energizer Batteries
Manufacturer	Energizer Batteries
Model Name	ENR L522BP2.H4 LITH 9V-2 EMOD
Model Number	30039800911576
Number of Batteries	2 Lithium Metal batteries required. (included)
Product Dimensions	0.7 x 3.7 x 4.5 inches; 2.4 ounces
Reusability	Single Use
UPC	039800911575
Unit Count	2 Count
Voltage	9 volts

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KSh6311

Duties & taxes included

In stock

Sold byAmazon KenyaDelivered 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 Kenya.

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