9V USB-C Rechargeable Batteries

This fast-charging lithium battery offers 1000+ cycles and a convenient USB port for charging two batteries simultaneously. It includes an LED indicator and smart technology for safe charging.

• The description claims that most smoke detector and carbon dioxide detector manufacturers recommend not using rechargeable or rechargeable lithium batteries in their products.
• The description claims that users should always check their smoke detector and carbon monoxide detector instruction manuals and manufacturer’s recommendations before selecting batteries.