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a short circuit Certain batteries will flash 3 times to indicate a short circuit. Most standard e-cig batteries will have what’s called short circuit protection, so when there is a short and you press the fire button it will just blink 3 times and then won’t do anything.

How to fix blinking 3 times issue with battery for cart

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My Blu Blinking Blue Light | Fix it Quick and Easy | Vape How To

How to Fix the MyBlu (My Blu, Vape, Electronic Cigarette)

Fix blinking problem on your Vape cartridge

Blinking