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

🛡️Leak-resistant & durable

❄️🔥Works -40°F to 140°F

R$156

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Description

⚡ Energize your essentials with unstoppable power!

POWER THAT OUTLASTS - Lasts up to 20% longer in toys than standard batteries—stay ahead of the pack.
EXTREME WEATHER READY - Reliable performance from -40°F to 140°F—your devices never miss a beat, rain or shine.
LEAK RESISTANT DURABILITY - Engineered to resist leaks, protecting your valuable devices and ensuring longevity.
VERSATILE HIGH TECH POWER - Perfect for cameras, smart home devices, and flashlights—power your lifestyle with confidence.
LIGHTWEIGHT LONG LASTING - Weighing just 1.28 ounces, these 9V batteries store power for up to 10 years—always ready when you are.

Energizer Ultimate Lithium 9V Batteries deliver 20% longer life than Energizer MAX, operate reliably in extreme temperatures (-40°F to 140°F), and feature leak-resistant construction. Lightweight and designed for long-term storage up to 10 years, these batteries are ideal for high-tech devices, toys, and emergency backups.

Specifications

Asin	B018N7YZL6
Batteries	1 AAA batteries required. (included)
Best Sellers Rank	#22 in 9V Batteries
Date First Available	November 2, 2015
Department	Unisex
Item Model Number	L522BP
Manufacturer	Energizer
Product Dimensions	1.25 x 0.5 x 0.75 inches; 1.28 ounces

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R$156

Duties & taxes included

In stock

Sold byAmazon BrazilDelivered 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 Brazil.

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TrustScore 4.5 | 7,300+ reviews

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