Does this use a button top or flat top 18650?

we suggest flat top,but in face,both of the button top and flat top 18650 can be used

What is the correct battery for this device? What should it be rated at?

18650 - But, you're not going to be doing much other than pulsing....If you want to be on the safe side, installed a Molicel P26A - Tough battery, rated at 35A, and long lasting charge. Check out 18650batterystore.com - Only a few bucks for the battery.

How in the world do you open the battery door? Do I stick something in that long thin slot to press something?

There is a smaller slot right at the edge of the battery cover. you can open it with your fingernail or a small screwdriver

What is the USB port used for?

For charging. Still requires one “18650” battery.

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Description

🔥 Build Smart, Vape Safe! 🔥

SAFETY FIRST - Built-in high temperature protection to keep your builds safe.
USER FRIENDLY - Easy-to-read battery level indicator ensures you're always powered up.
COMPACT DESIGN - Lightweight and portable at just 9.07g, perfect for on-the-go coil enthusiasts.
SMART PROTECTION - Reverse battery and short circuit protection for worry-free building.
VERSATILE TESTING - Test coil resistance and battery output voltage with precision.

The Tuopuke521 TAB Mini Coil Burning Measure Building Platform V3 is a compact and efficient tool designed for coil DIY enthusiasts. With features like a battery level indicator, USB charging, and multiple safety protections, it ensures a safe and precise building experience. Weighing only 9.07g, it's the perfect companion for vapers on the move.

Specifications

Manufacturer	CoiledVapr
Part Number	CV03
Package Dimensions	8.64 x 6.35 x 2.03 cm; 9.07 g
Item model number	CV03
Colour	Black
Style	Modern
Material	Abs
Power Source	Battery Powered
Item Package Quantity	1
Batteries included?	No
Batteries Required?	No
Item Weight	9.07 g

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