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.

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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

Q: 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.

Q: Life span in smoke alarms?

Lasted only 1 year 5 months in my smoke detector.

Q: 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.

Product ID: 316513149

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Details

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

⚡20% longer life vs MAX

🕰️10-year shelf life

❄️🔥Works -40°F to 140°F

Frequently Bought Together

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

Energizer Ultimate Lithium AA Batteries Pack, 1.5V AA Batteries, 24 Count

Energizer AA Batteries, Ultimate Lithium Double A Battery, 8 Count

Description

⚡ Energize your essentials with power that never quits!

POWER THAT OUTLASTS - Lasts up to 20% longer in toys than Energizer MAX batteries, keeping your devices energized and ready.
VERSATILE DEPENDABLE - Ideal for toys, clocks, and smoke detectors—your go-to battery for safety and play.
EXTREME TEMPERATURE READY - Reliable performance from -40°F to 140°F ensures your gadgets never miss a beat, no matter the season.
LEAK RESISTANT DURABILITY - Engineered with leak-resistant construction to protect your valuable devices from damage.
LIGHTWEIGHT LONG LASTING - 25% lighter than standard alkaline batteries, combining portability with up to 10 years of storage life.

Energizer Ultimate Lithium 9V Batteries deliver up to 20% longer life in toys compared to Energizer MAX, operate reliably in extreme temperatures (-40°F to 140°F), and feature leak-resistant construction. Lightweight and capable of holding power for up to 10 years in storage, these batteries are perfect for toys, clocks, and smoke detectors, ensuring your devices stay powered when it matters most.

Specifications

Package Dimensions L x W x H	10.3 x 9.3 x 2.5 centimetres
Package Weight	0.07 Kilograms
Product Dimensions L x W x H	32 x 13 x 19 millimetres
Item Weight	0.08 Pounds
Brand	Energizer
Included components	Battery Pack
Part number	L522BP
Size	1 count
Style	1 Count
Guaranteed software updates until	unknown

Have a Question? See What Others Asked

what is the mah?

are these l522bp-2 the same as advance lithium l522 ?

Life span in smoke alarms?

Is there any chance of these batteries used in a smoke detector exploding and causing a fire?

Reviews

D**N

A+

6.02.2023

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