Cordless Power Tools & Brushless Motor Mastery

Why are newer high-output power tool batteries transitioning to 21700 lithium cells over older 18650 cells?

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 Correct Incorrect21700 cells offer ~50% more internal volume and lower internal impedance, allowing higher sustained discharge current with much lower heat buildup.

Why are newer high-output power tool batteries transitioning to 21700 lithium cells over older 18650 cells?

• Lower internal impedance and higher volume permit higher continuous current draw without thermal throttling
• They are made entirely of biodegradable recycled cardboard
• They produce alternating current (AC) directly
• 21700 cells are smaller and lighter than 18650 cells