9V Lithium-ion Battery - singles Philadelphia

Nickel Iron Battery and Rechargeable 9V Batteries 1.5V 850mAh USB Lithium Ion - China USB-C Rechargeable Battery, Inr102040-850mAh Cell

Li-Ion 9 V Single Use Batteries for sale

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Reutilizing 3D LED mag lite… battery choices? : r/flashlight

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9 Volt - Next Generation 9Volt

How to Choose Batteries

Provides enough power to last up to 10-years as a backup battery in ac-powered smoke detectors. Low self-discharge - Tenergy 9volt lithium battery features ultra-low self-discharge of only 2% a year and are date stamped for freshness. These batteries will provide power, even after 10 years in proper storage.

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