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This product is a lithium battery charging pool, please do not make the battery over discharge, otherwise the capacity failure for a long time no use of advice full of electric storage!
The lithium battery life theory is 1000 cycles.
high drain Vapcell K40 21700 4000MAH 30A continuous discharge current rechargeable battery pk 40T
Unique Features :
Performance similar as 40T
Fully charge before first use.
Never short (connect positive and negative size) battery.
Keep them always in battery case, or any other insulating material.
Never keep this battery together with metal objects (short circuit can happen if you do).
Never carry bare cell in your pocket with keys, change or any other metal objects.
Please read the user manual carefully before using this device