The realistic parameter is 21V in a single rechargeable battery, ensure mini chain saw can keep running 30-45 minutes. Package includes 1 assembled 6 Inch battery chainsaw, 2 battery, 1 chains, 1 goggle, 2 gloves etc, ready to use out of the box. Enjoy the double battery life. After the chain wears out, you can also replace it by yourself.
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