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VCC For 5v if use with 5v level system Such as ( Arduino UNO
You can use it to connect some serial device to your PC via USB port
it outputs low and keeps at low power state
5%（0-4550NTU）
These can be read by almost any 13
Rechargeable18650 Li-ion Battery 3.7v (Recycled) Relay Module VCC For 5v if useIntroduction : Li Ion 18650 cylindrical rechargeable batteries. Used for device needs 3. 7V power Building portable power device that needs high energy density and low weight Product Specifications Capacity. You can connect more than one to get more voltage or current. Features : Type : Lithium Ion . Voltage : 3. 7 V. Battery Capacity : 2200 mAh.
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