The yellow electric chain saw is compatible with DeWlt's 18V battery. The red electric chain saw is compatible with Milwaukee 18V batteries. Note:"V18, 48-11-2200" seres batteres are not supported. Compatible with all For Milwaukee 18V M18Lithium lon Batteries48-11-1811,48-11-1815,48-11-1820,48-11-1822,48-11-1828,48-11-184048-11-1841,48-11-1850and more.
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