I am giving some thought on what I want to do while bicycling. There are handlebar extension power banks and other power banks that use 18650 batteries.
https://www.amazon.com/dp/B09QCVM125/?tag=cpf0b6-20
https://www.amazon.com/dp/B09QCVM125/?tag=cpf0b6-20
NITECORE F4 Four-Slot 18650 Battery Charger & Power Bank
The NITECORE F4 is a 4 slot battery charger that also double as a power bank & battery organizer. it can charge 18650 batteries, phones, flashlights etc
www.nitecorestore.com
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