Cordless mowers are only practical for the smallest yard. In effect a cordless mower will cost two to three times as much as a gas mower which work better in all ways except that you have to buy gas. Unless your yard is very small the cordless mower just isn't practical, although it would save you a good deal of trouble with gas and oil.
A few different brands of cordless mowers are Bosch, Black and Decker and Lawnatron. Most mower companies offer a cordless model as well as gas and corded electric models.
Cordless lawn mowers rely on an electric starter in order to start the engine. This contrasts with regular pull start motors which require the user to pull/spin the crankshaft and start the engine.
Ratings are based on specific criteria, so how high a cordless mower is rated depends on what you're looking for. Home Depot has several cordless mowers, most of which are tagged with the particular features, which allows you to compare each one to the others. You can also rely on the salesperson for input.
I've seen some at the local Wal-Mart (Canada). The cordless one. The 20" cordless model (60020) is at Walmart in the USA (usually $320, only $225 at my local Walmart in California)
The answer is going to depend on the size of the battery and what you are mowing. 12-volt batteries provide 30 - 40 minutes of mowing time; 24-volt mowers last 40 - 75 minutes; and 36-volt mowers run for up to 90 minutes. If your lawn is thick, lush or tall then the charge may not last as long.
Zero turn lawn mowers have been developed to increase speed and efficiency compared to push mowers. In addition to being quicker and providing the ability to mow very close to objects, they are less demanding on the person mowing. Lawnmowerguide.com can give you specific guidelines on choosing the best mower for your landscaping business.
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There are push mowers, battery opperated mowers, and reel mowers that are available that you walk behind and push. You can also check Toro.com or Lawnboy.com
Ride on lawn mowers can vary greatly in cost. The cheapest are between $500 and $1000. Models increase in price from there, all the way up to $5000 or more.
The main difference between commercial and personal lawn mowers is simply the durability of the machines themselves. Personal lawn mowers are manufactured to last through many years of once per week mowing. On the other hand commercial mowers are built to handle daily long hours of mowing year round. Most commercial mowers also have wider mowing decks and wider blades to perform the job faster.
You can buy zero turn mowers which use Honda engines. However Honda only builds push mowers themselves and push mowers don't need zero turn like riding mowers do.
There are push mowers, riding mowers, electric mowers and more. Another word for lawn mower is grass cutter. Riding mowers are sometimes called tractors.