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Efest offers you its battery 26650 !

Here is the battery 26650 of Efest with a 4200mAh autonomy and can support a discharge of 35A in continuous and 50A in pulse.

CAUTION:

Only use a battery suitable for your box or mod
Always store and transport your batteries in a special case or box
Do not use a damaged battery
Do not use a non-wrapped battery (without protective cover)
Do not use a battery beyond its amperage limit
Do not put a battery directly into your pocket
Do not touch the battery with metal objects, coins etc
Do not disassemble, deform or puncture the batteries
Do not expose to high temperatures or humidity