Got the batteries today, put them on a tester and got an appropriate reading. Longevity is difficult to know since I would have to wait the 10 years to determine that. The thing with Lithium batteries is the longevity. If your smoke detector, or carbon monoxide detector are inconvenient to reach, you want to have the longest life battery you can find. Lithium should do it.
From the vendor:
- LONGEST RUN TIME 9V - Tenergy's 9V Lithium batteries offer 2.5 times more capacity than traditional alkaline 9V batteries available. Provides enough power to last up to 10-years as a backup battery in ac-powered Smoke detectors
- RELIABLE POWER - Tenergy 9volt lithium battery features ultra-low self-discharge of only 2% a year and are date stamped for freshness. We confident these batteries will provide power, even after 10 years in proper storage.
- DESIGNED FOR BEST FIT - Tenergy's non-rechargeable batteries 9 volts is slightly slimmer with rounded edges and corners ensuring a perfect fit in any 9volt electronics.
- OUTDOOR TEMPERATURE PERFORMANCE - Use these batteries in your devices outdoors or inside and receive reliable power whether it's as cold as -40°F or as hot as 140°F.
- CERTIFIED QUALITY - Tested and certified by UL standard for safety. Included with every purchase is free lifetime support from our local team based in California.
If reviewing a product, it may have been received free of charge. That will NEVER have a bearing on my recommendations.
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