40V Home Depot special (Ryobi) used here. One charges gives about 20 minutes of continuous cutting on grass. Tearing through thick weeds, blackberries and wild rose cuts it down to about 15 minutes.
I’ve bot the same battery in a pole saw and slap it in when the first one dies. After that it’s time for a beer.
Charge time is about and hour and a half from dead zero.
bot=bought.