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Samsung INR18650-30Q 3000mAh Unprotected Button Top 18650 Battery
This is a genuine Samsung 30Q battery, meant for high-drain devices like high-power flashlights. It is a button-top, but the button is very shallow, so it is 65mm long. This is perfect for flashlights that require exact 18650 size of batteries. It even fits in lights that require flat-top batteries. Note it is unprotected, but the INR chemistry is much safer than ICR, so protection is usually not needed.
Please note this battery is not recommended for vaping devices.