Friendly Robotics RoboMower 21-Inch Automatic Cordless Electric Lawn Mower #RL850 at Garden Tool Store

Friendly Robotics RoboMower 21-Inch Automatic Cordless Electric Lawn Mower #RL850 from Electric Mowers

Friendly Robotics RoboMower 21-Inch Automatic Cordless Electric Lawn Mower #RL850 by Friendly Robotics

Features

Automatic lawnmower designed to mow entirely by itself

Efficiently and safely mows lawn, while you relax

Cuts up to 10,800 square feet on a single 24-hour charge

Onboard sensor and bumper avoids obstacles; built-in child safety lock; powerful mulcher

5,800 rpm blade speed; 2-year warranty

Product Description
The Friendly Robotics RoboMower Automatic Lawn Mower is a fully automatic lawnmower designed to mow your lawn entirely by itself. The fully-automatic mower travels across the lawn in a crisscross pattern, covering up to 10,800 square feet on a single charge while you relax on the porch. The RoboMower works by mowing within a selected boundary outlined by a small wire (the unit includes 500-foot perimeter wire). Its navigation system can handle any lawn, regardless of shape, slope, or obstacles. It is capable of mowing 3/4 of an acre on one battery charge. Because the mower is rechargeable, it doesn't need gas or oil, and emits no pollution and little noise. However, it's still as powerful as conventional mowers, employing a battery-powered 3-blade, 21-inch powerful cutting system equivalent to a 5-1/2 HP gas mower, but with better mulching and a 5,800 rpm blade speed (double that of a typical gas unit).

The Triple Chamber Mulching system compacts grass into small clippings that decompose naturally on the lawn, improving your lawn's health while lightening your workload. The mower also comes with a host of safety features, such as a child lock and a detection system that automatically turns off the blade if the mower is lifted. It also includes a user-controlled theft protection and disabling system using a personal password. The mower comes with plenty of oomph, completing about three hours of mowing with a single 24-hour charge. The RL850 is also upgradeable to the RL1000, which comes with a programmable docking station. The RL1000 will automatically depart and return to the docking station at preset times to mow the lawn--even at night while you're sleeping--adding yet another level of convenient operation. A 2-year warranty is included and comes complete with 2007 generation software.

Amazon.com Buying Guide
Five Tips for Buying a Mower
Choosing a lawn mower is a matter of sifting through a bewildering array of types, power ratings, and fuel sources. Lets break it down a little to make the process easier.

What types of walk-behind mowers are there?
There are four basic choices: push reel, electric, cordless, and gas. All have strengths and weaknesses.

Push reel mowers are powered by you. Theyre quiet, they dont need cords or recharging, and they dont pollute. But on large lawns, you might not want the workout you get when using a push reel mower. They also tend to be less effective on grass taller than two inches.
Electric mowers need to be plugged into an outlet to power them, which means youre constrained by the location of power outlets, the length of your power cord, and any obstacles that may snag the cord. If you have a small yard but dont want the forced exercise of using a push reel mower, an electric mower may be for you.
Cordless mowers are powered by a rechargeable battery. You dont have to deal with the hassles of keeping a cord plugged in, but battery life becomes a constraint. Depending on the battery capacity, the size of your yard, and the height of your grass, you may not be able to complete your mowing job on one charge.
Gas mowers offer the most power, which is best if youll be mowing tall, dense grass or if your yard is larger than 2,000 square feet. But you will have to keep gas and oil on hand as well as keep the engine serviced.

What do all the power measurements mean?
All that matters to you is whether the lawn mowers blade will spin fast enough to cut your grass. Unfortunately, mowers are rated in far more technical terms.

For gas mowers, there are three power measurements you may see:

horsepower (hp) refers to the amount of power the engine can produce;
torque is the amount of horsepower that is transferred to the blade;
cc (cubic centimeters) is another to measure an engines power based on the displacement volume of its cylinders.

There also are two types of engines: two-stroke (also referred to as two-cycle) and four-stroke (or four-cycle). Conventional wisdom is that two-stroke engines offer more power but also more pollution.
For electric and cordless mowers, power often is measured in volts, amps, or watts. To satisfy your inner techie, heres how to calculate the horsepower:
47. Multiply the volts by the amps to get the wattage.
48. Divide the wattage by 746 to get the horsepower.

More horsepower doesnt always mean more cutting power. Thats why, starting in 2007, most lawnmower manufacturers began rating walk-behind lawn mowers in torque power or ccs--not horsepower. If torque isnt available for a gas mower, higher cc figures usually mean higher torque (and more fuel used per stroke, incidentally).

However, you dont want to buy a mower based on the power measurement alone. Make sure it has the features, warranty, and quality of reviews youre seeking.

What features should I look for?

Cutting Deck
This refers to the blade housing. The wider the cutting deck, the fewer passes it will take to mow a given area. However, consider how many obstacles there are in your yard. The wider the deck, the tougher it may be to fit the mower into tight spaces.
Mulching and Bagging
Want to collect your clippings? Choose a mower with a rear- or side-bag option. Want to leave clippings on the lawn as fertilizer? Get a mower that mulches. A "3-in-1" mower will mulch, bag, or side-discharge.
Wheels
Larger wheels mean easier handling, especially over rough terrain. If you can, go with at least 7-inch-diameter wheels in the rear--larger if your yard is hilly or uneven. Some higher-end mowers have front wheels on casters, which gives you an extremely tight turning radius.
Height Adjustment
Most mowers allow you to adjust the distance between the blade and the ground. Think about how much range you really need.
Safety
Many newer rotary machines are available with a lever or bar that must be depressed to keep the mower running (some models include a handy blade-brake that lets you release the lever without killing the engine).
Also, look for models with a rubber flap at the back to block objects thrown from the blades. You should always wear safety goggles when mowing and follow all the manufacturers safety instructions regardless of the mower youre using.
Batteries
If youre buying a cordless mower, think about how long it will run on a single charge. Most batteries take several hours to recharge, so you want to make sure its going to get the job done before it runs out of juice. As a rule of thumb, a typical 24-volt mower will run up to one-and-a-half hours and cut up to a third of an acre; a 36-volt mower will go for three hours and cut up to a half an acre.
Cord holder
A cord holder is useful for keeping the cord of your electric mower out of the way when you make turns.
Starters
Gas mowers are available either with recoil (pull-cord) or electric starters. Newer recoil motors start much quicker than those you remember from summers past. However, go with electric if you can afford it: your mower will start with the push of a button or the turn of a key.
Self-propelled or push?
A self-propelled mower moves forward without you having to push it. All you have to do is steer. If you have a relatively flat lawn, save a few bucks by skipping this feature. However, if your landscape has a slope or an irregular contour, a self-propelled model may be the best choice. Rear-wheel drive tends to offer better traction.
Variable Speed
If you want a self-propelled mower, look for models with variable speed. This feature allows you to make adjustments within a continuous range so you can find the exact speed thats comfortable for you.

What servicing and maintenance is necessary?
Always buy a mower that comes with a manufacturers warranty and follow the manufacturers routine maintenance instructions for

Cleaning the mower after usage;
Keeping the blade sharp;
Keeping the engine tuned up (gas mowers); and
Keeping the battery charged (cordless mowers).

While Amazon.com does not accept returns on gas-powered mowers, the manufacturers Website or product manual will list the nearest service center.

What does CARB-compliant mean?
CARB is an acronym for California Air Resource Board, whose stringent air-quality standards have been adopted by many states. If your state requires compliance for gas mowers, confirm that your model is CARB-certified before you buy. While CARB-compliant mowers run cleaner than noncompliant models, they still emit pollutants. If you want to go green, an electric or push reel mower is the way to go.

Reader Reviews
First off let me say I've seen a mix of reviews. Most of them have been positive, but a few negative ones as well. I will discuss the negative points fully since they should be mentioned, but they are far outweighed by all of the positive things I can say about this mower, which is why I have given it four stars. I would, and should give it five stars, but I want people to know how I honestly feel and I want them to read the negative points so they can decide if this is best for them. The subjects I will cover are setup, use, upkeep, quality, and price. Setup (Three stars): First off, this is by far the worst section. I can see a lot of potential for someone to set their mower up in an improper fashion resulting in limited performance, but if you keep in mind that this mower is supposed to help you overcome the bulk of your yard work keep in mind it doesn't do everything. It works as has been noted by many people by placing a wire around the perimeter of your yard. Let me say that this is best achieved by breaking your yard up into sections, especially if you have a medium to large sized yard (half to full acre). Getting the wire just right is the hardest part, and the wire is supposed to be held in place by special plastic stakes that nail it down. The package comes with 200 of these pegs and for any good sized yard it's not nearly enough since they really need to be close together to keep the wire from becoming loose enough for the mower to snag itself on. Alternatively, you can bury the wire up to six inches into the ground which I highly recommend if you have that patience and tools. Otherwise either buy extra stakes when you purchase your mower, or do as I did and visit your local department start and aquire some relatively cheap plastic tent-stakes since this can work out cheaper for you in the end. Next is the issue of the wire itself. 500 feet is included and the officially available 16 gauge solid copper wire they make available for purchase is severely overpriced (nearly $50). Since 500 feet was barely large enough to do cover my front yard I had to buy 1000 extra feet. After some research I discovered that 14 gauge THHN solid copper wire which is available at most hardware stores works equally well (if not a little better due to it's stiffness) and is much cheaper (around $16 for 500 feet). Setting the wire up is tedious and will require some adjustments and I feel that the process is a little more involved than they make it out to be. It took me the greater part of three days to get the wire setup in such a way that I was fully satisfied with it, and even still I can find areas that require an extra stake because the mower has worked them a little loose. Luckily I haven't manage to get one snagged yet, but this is because I've been supervising it closely to make sure it doesn't mow over a stretch that is too loose. I also can't stress nearly enough how important it is to get the direction of your wire correctly (as illustrated in the manual) lest you be faced with a robot that gets easily confused with flower garden/tree islands that are wired in the wrong direction of flow. After the setup though things are all downhill. So in closing the topic of setup, expect some hair pulling and annoyances because it isn't painless unless you do bury the wire which I would highly recommend after my experience with staking the wire down. Use (Five Stars): This is where it starts to get good. The mower does it job as expected, and rather cleverly. It's ability to handle obstacles, zone-islands, corners, and even edges is much better than I expected. Keep an eye on the mower when you first get it to watch for problems, but most of them can be handled well with clever wire placement. The robot handles ruts, holes, and other such things better than the negative reviews I've seen. If it gets stuck in small pits or other such irregularities, it can work itself free. Most of the negative reviews I've seen have blamed the issues on the design, but the owners clearly owned the RL500 or 800. The RL850 is what I own and what this review is centered around. It has improved tires and navigation software and does a great job dealing with the issues some people have complained about in the past. Therefore any negative reviews you have seen regarding these issues are aimed at the RL 500 and 800 exclusively and not the 850. Those reviews are highly inappropriate for this model and should be taken with a grain of salt. (NOTE: The 500 and 800 are no longer available from Amazon.Com or any other site that I've visited.) As for the quality of cut I can vouch for every positive review I've seen. It's a little slow but it is persistent. The battery lasts much longer than advertised and a full day's charge is enough to mow all three of my zones. I suspect the length of a charge for me will shorted as the battery ages, so I will almost certainly purchase a spare battery and rapid charger. That is something else I highly recommend. One battery may be enough while it is new, but it won't stay new forever. The rapid charger also will help a whole lot since the robot takes almost a full 24 hours to charge the battery on it's own. Upkeep (Four Stars): This is one area where it doesn't fare as well as it's performance. The blades should not be sharpened in other to avoid getting them out of balance. This isn't by itself a bad thing but their price may turn some people off (see price section below). Since you can hose under the deck you will be picking grass-sludge out by hand or with a tool, and it does tend to get bits of grass all over itself. The wheels can also cake up with dirt and grass so I recommend not using this mower on wet grass or in mud. Since the wheels don't easily come off (if they come off at all) cleaning them is a chore. Though the mower claims to be able to handle moist grass and slight rain, I recommend avoiding it. It will make cleanup easier in the end if you restrict the use of your robot to dry and sunny days. Quality (Four Stars): Many have complained about the quality of the unit. Don't listen to the most negative things you've heard. Some have complained about the battery not working (Did you check the replaceable automotive fuse, people?) and others have complained about the 2 year warranty not being long enough. Most complaints are centered around the plastic it's constructed out of (as opposed to what? Metal?) or the lifespan of the battery. These are items you can hardly complain about so that leaves just the motors and the controls, both of which are obviously very adequate for the job. Yes, the robot mower is made of plastic. And yes the perimeter switch does feel kind of cheap. But overall the qualities that matter most are outstanding, and I've never heard of a motor being burned out. In fact the mower has the ability to stop and cool itself down if it feels the motors are being worked too hard. So if you have to knock the quality of this unit let's make some real complaints. The perimeter switch is my biggest complaint, and isn't designed for a more permanent installation in a yard. This could be improved upon but it is by no means a show-stopper. The robot itself feels quite solid. The controller feels at least as solid as any video game console controller. And the other major parts seem very rugged. It's hard to knock anything important about the quality of this unit. So once again, take the negative talk with a grain of salt. Price (Three stars): Just over $1000 for the mower itself is a great price. I have no problems with that. However, the connectors for the perimeter switch, the switches themselves (should you need extras) and the cost of the wire, blades, and batteries (which you will also need to replace once every few years) is outrageous. Avoid the cost of the wire and the stakes by using alternatives that are cheaper. They work just as well and it will save you lots of money. That leaves the blades and the batteries, which you can only get in official form from FriendlyRobotis (and their resellers). At around $50 and $200 respectively the price is very steep and it's a cost any potential buyer must feel comfortable with. I personally think it's worth that much to spend about $350 over the course of three years to keep my robot mowing and to keep my yard looking good, but this may be a bit much for most people to swallow. Granted, this solution won't be best for everyone. However for some people it is clearly the best solution to keeping a yard well groomed. Don't let the the naysayers dissuade you. The worst points are the obvious ones that anyone could have guessed, and the best points are the reasons people buy these things. I couldn't be happier. Comments (2) | Permalink | (Report this)

Friendly Robotics RoboMower 21-Inch Automatic Cordless Electric Lawn Mower #RL850
List Price: $1,599.99
Available from Amazon
Price: $1,418.99
Updated on 8-29-2008.

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