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The Efest IMR 18650 battery is designed to provide a more consistent level of voltage between recharges. Since it is a LiMN and not a Li-ion battery it does not require circuit protection; as with all batteries, please handle with care. Because it is a high drain battery, it is able to withstand greater amp loads than traditional, non-high drain batteries. This translates into far less drop off in vapor production over extended periods of time.
The Efest 18650 battery has a milliampere-hour rating of 2000mAh. Compared to Li-ion batteries, we have found them to last as long or longer while providing a more consistent vape. If you enjoy 3.7v vaping and are looking for better performance, this is the battery for you.
*These batteries are button top.