The batteries are madeof metal, normally alloy tube. The alloy tube is wrapped in vinyl to make it look like a cigarette. The most common batteries are wrapped in white vinyl, but many other colours and designs are available. Sealed inside the tube are the rechargeable lithium ion battery and a chipset to control the charging rate. This chipset will also cut the battery out if it is puffed for over six seconds to stop the battery overheating.

At one end of the battery is an LED light that glows when the electronic cigarette is puffed. This feature is to make the electronic cigarette more realistic looking, but will also flash when the electronic cigarette needs recharging. The LED lights are available in different colours, the most popular being orange, blue and green.

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Website: www.pulse-cigarettes.com