Volts and amp-hours
- Voltage roughly sets how much power the tool can deliver. 18–20 V tool batteries suit handheld blowers and trimmers; 40 V to 80 V platforms run mowers and strong blowers.
- Amp-hours (Ah) set how long it runs. Multiply volts by amp-hours to get watt-hours, the fair way to compare batteries across brands: a 56 V, 5 Ah battery holds 280 Wh.
Manufacturers count volts differently (some advertise peak, some nominal), so compare watt-hours and the tool’s real-world specs, like CFM and mph for blowers.
Pick by what you already own
- You own DEWALT, Milwaukee, Makita or Ryobi drills: their lawn tools take the same batteries. Fine for small yards and patios.
- Half an acre or more, or lots of wet leaves: a dedicated high-voltage lawn platform, like EGO (56 V) or Greenworks (80 V), has the mowers and blowers that match gas.
How many batteries
One battery runs a blower for a short cleanup on high. For a big fall cleanup or a mower plus blower in one session, plan on two, and charge one while you use the other.
Storage
Store batteries indoors over winter, partly charged, away from heat. Cold garages shorten their life and slow charging.