Question 1

How long do these batteries last in a smoke detector?

Accepted Answer

The manufacturer states these lithium 9V batteries can provide up to 10 years as a backup battery in AC-powered smoke detectors, and one reviewer noted the expiration date was only 4 months into the first year, which worked for their hardwired smoke alarm backup.

Question 2

Do these batteries last longer than regular alkaline 9V batteries?

Accepted Answer

The listing says these offer 2.5 times more power than traditional 9V batteries, and one reviewer reported they lasted all day in their equipment versus only a few hours with their normal 9V batteries, though another reviewer said they died in about half the time compared to competitors.

Question 3

Do these batteries leak and damage devices?

Accepted Answer

The listing highlights an anti-leak design, and one reviewer noted there is much less risk of a leaking battery damaging the device compared to alkaline batteries.

Question 4

What temperature range can these batteries handle?

Accepted Answer

The listing states an operating temperature of -4°F to 140°F, and one reviewer said they chose lithium over alkaline because they use them outside in the winter and lithium performs better in temperatures as low as -10°F.

Question 5

Are these batteries a good value for the price?

Accepted Answer

One reviewer described them as pricey compared to most batteries but a good value given they are lithium, and another reviewer said the price was good.

Tenergy 9V Lithium Batteries, 1200mah Non-Rechargeable Batteries, 10 Years Shelf Life Lithium 9 Volt Batteries, 2 Pack

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