There are plenty of fancy power banks on the market but most of them don’t let you change their battery. The BT-20 Wingman is a tactical power bank that is compatible with flat top 21700 and 18650 batteries. It has a RGB power meter that detects battery level on load.
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This power bank comes with overheat, overcharge, and reverse polarity protection. The BT-20 weighs only 38g without batteries. You can order it in arctic white and metallic silver.
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