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The battery is only about as large as a small cigar, but it operates at five volts so it produces much more vapor than your average 3.7-4.2 volt e-cigarette battery with the same size and shape

Over the last two decades, the FAA has recorded 524 lithium battery incidents caused by the following devices: International Airlines Power Bank Restrictions While Southwest is the first US carrier to implement its new policy, some international carriers, particularly in Asia, have imposed stricter restrictions regarding lithium batteries and power banks

Store your battery fully charged out, of the sun and away from extreme temperatures, and rotate your batteries to maintain efficiency

Make sure it has a new air filter at the very least

Several reports suggest that heat attracts smoke residue, which then collects as a coating on the bulb