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a finger on a button
And it automatically charges
Ring Shape: Ideal for connection to bolts and terminals
so your devices get extended runtime
Li-ion Lithium 5v 2a 18650 3.7v Battery Charger Charging Module Diy Power Bank motoin sensor a finger on a buttonDescription: professionally manufactured: Professional manufacturing, stable performance and high reliability. With stable performance, the professional manufacturing process has a long service life. durable and stable: Made of high quality environmental protection material, durable and practical to use. energy saving: Powered by builtin lithium battery, energy saving and environmental protection. plug and play: This portable solar charger is easy to
