Has anyone had a problem with them being a bit larger than a standard alkaline 9-volt battery? I read some brands are tight in smoke detectors

They are slightly larger than normal 9v batteries. If you have the battery terminals that snap onto the battery, you might be ok. I have the type of smoke alarm that you slide the battery into and it’s supposed to “mate itself”. Because of the size difference and the battery being really squishy (not rigid) they did not work for me- I had to return all 8.

Are these batteries made in China or where?

While my personal belief is that it is safe to assume they are made in China, there is nothing on the batteries or on the packaging that indicates the country of origin.

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Enegitech 9V Lithium Battery

Product ID: 53934015

Details

Battery Capacity
1200 Milliamp
Battery Cell Composition
Lithium
Brand
Enegitech
Number of Batteries
4 Lithium Ion
Recommended Uses For Product
Camera Digital

⏳10-year shelf & backup life

⚡1200mAh high capacity

🌡️Operates -20°C to 60°C

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R$334

Duties & taxes included

In stock

Sold byAmazon BrazilDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔋 Power that outlasts your hustle.

HIGH DRAIN HERO - Outperforms alkaline batteries by 3-5x in power-hungry gadgets like digital cameras and multi-meters.
READY WHEN YOU ARE - Factory fresh with a decade-long shelf life—always prepared for your next emergency or project.
EXTREME WEATHER WARRIOR - Smart built-in protection ensures flawless performance from freezing cold to scorching heat (-20°C to 60°C).
DOUBLE THE POWER DOUBLE THE CONFIDENCE - 1200mAh capacity lasts 2x longer than standard lithium batteries, keeping your devices powered when it matters most.
UNMATCHED LONGEVITY FOR CRITICAL DEVICES - Up to 10 years of reliable backup in smoke detectors and fire alarms—because safety can’t wait.

The Enegitech 9V Lithium Battery delivers a robust 1200mAh capacity, offering twice the runtime of typical lithium batteries and up to 10 years of backup power for essential devices like smoke detectors and fire alarms. Engineered with smart protection, it operates reliably across extreme temperatures (-20°C to 60°C) and excels in high-drain electronics, making it the go-to choice for professionals who demand longevity and consistent performance.

Specifications

ASIN	B076MV1Z3P
Antenna Location	Camera,Digital,Smoke Detectors
Battery Capacity	1200 Milliamp Hours
Battery Cell Type	Lithium Manganese Dioxide
Battery Weight	140 Grams
Best Sellers Rank	#121,851 in Health & Household ( See Top 100 in Health & Household ) #92 in 9V Batteries
Brand	Enegitech
Built-In Media	Battery Pack
Customer Reviews	4.7 4.7 out of 5 stars (362)
Item Type Name	9v, lithium, battery, 1200mah, non-rechargeable, li-ion, battery.
Item Weight	141 Grams
Manufacturer	Enegitech
Model Name	9V
Model Number	9V 1200mAh
Number of Batteries	4 Lithium Ion batteries required. (included)
Reusability	Single Use
UPC	611677932503
Unit Count	4.0 Count
Voltage	9 Volts
Warranty Description	1 year manufacturer

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