All cordless lawnmowers have spare batteries available. The advantage is that you can continue mowing before your battery has finished charging. If your provided battery won’t last for your entire lawn, then look to buy a spare battery. Be careful with cheaper machines, since replacement batteries are often expensive and you may be better off spending the money on a longer-lasting, more expensive lawnmower. Look out for different battery charger options, too. Slow chargers that take hours are fine if you mow your lawn once a week. If you need your batteries sooner, then a faster charger makes more sense.