Use the beefier extension cord

Yes, it’s safe — and actually better.

Amp rating on an extension cord is the maximum current it can safely carry. Plugging a 5-amp charger into a 15-amp cord doesn’t force 15 amps through the charger. The charger only draws what it needs. Electricity doesn’t work like a fire hose.

What matters is the cord’s wire gauge. A higher-amp-rated cord typically uses thicker wire (lower gauge number). That means less voltage drop and less heat buildup. Your charger runs cooler and more efficiently. The only downside is the cord is heavier and costs a few bucks more.

The real danger is going the other way: using a cord rated lower than what your tool draws. That’s how you melt cords and start fires.

Don’t skimp on extension cords. Buy one that’s overkill for your smallest device.