Fun but scary battery waster
348262
This is a very fun and exciting toy however, after getting hit by it one time, my 3 year old is petrified. I still love it and I'm the mom!  Another negative is the battery doesn't hold a good charge.
192990
We just bought this for my daughter for her 5th birthday.  On the plus side, she loves it.  It is very intuitive for a young child to operate, and there are a variety of age-appropriate game/book choices, both fun and educational.  You must hook it up to your computer to receive them or buy cartridges (which are subject to getting lost).  Moreover, the games are significantly more expensive than the typical (often free) app for a Kindle or iPad.  The number one enormous drawback of this device is that it isn't rechargeable; it requires four AA batteries.  My daughter received this last Friday night, and now it is Tuesday morning.  We have already been through 8 batteries (!!!!) and are about to put in the next four.  This is a ridiculous burn rate on the batteries, and we are going to need to severely limit her access to this device because replacing four AA batteries every two days is simply too expensive.  So although this is a perfect electronic device for a young child, it will cost you plenty on the back end to load it with games and feed it batteries.
1881246
The battery well for this clock is too narrow for the type of batteries it takes, and the battery holder keeps catching on the battery casing at the top where the A+ side is and ripping batteries open, spilling battery fluid everywhere. One time it had caught on the battery and I didn't notice it and I smelled smoke and started looking around, and the clock was on fire. Lucky I wasn't quick to leave the house like I was about to do, or the whole place would have gone up in flames.  Before that it was going through batteries at least once a week. Oh, and the back has buttons for the alarm which are too difficult to see in the dark, or without my glasses which I don't have when I wake up, and there is no light on that side to see it easily with.
1471623
I am happy with the light output, size, and utility of this lantern. We light up our team person tent by removing the cover and hanging out upside down. My complaint  that's a huge deal for me, is that it eats batteries while off. We keep a stash of lights for power outages, and normally batteries last forever. However, every time I got out this lantern, the batteries were dead.

We'll still use it for camping, but not having it handy for emergencies really reduces it's value.
1678295
I have a Roomba, Scooba, and Dirt Dog.  These products do a fine job when they work.  Except for the new Dirt Dog (so far) they are plagued with battery problems.  The quality of batteries in these devices are absolutely the pitts.  Do not throw away the box that your little robot came in as you will eventually need it to send it back to the factory.  We have replaced batteries, under guarentee, in the Roomba and Scooba.  If accidentally uplugged, the battery in the Scooba will be totally dead in one day.  Works fine as soon as recharged overnight.  The Scooba's tank has to be pried open with a kitchen knife per iRobots suggestion to get it open when it jams. My advice to iRobot is to correct the problems in their present products before coming out with new products.  Especially the pathetic batteries.
1522789
I have a Neato-XV21 series vacuum and the batteries were dying before it could return to the station to recharge, so I got these batteries figuring that longer life batteries would solve the problem of the unit dying midway though its daily cycle.  I installed them and let the unit charge over night.  The next day we ran it and it kept driving itself off our stairs, making us think it had a sensor problem and that maybe this was the issue all along - after all, the Neato is supposed to know how far away from its base it is and return to charge BEFORE it runs out of juice and then resume cleaning once its recharged.  In any case , We called Neato and they told us that these batteries power the unit at a higher voltage that destroys the sensor inside rendering it completely useless. Not sure if this is the case, but they said that this is the reason Neato doesn't make extended-life batteries and that if you use these batteries with the unit, it renders your warranty null and void.  We are going to try sending it to a Neato-authorized repair company, but it looks like we'll have to replace the entire vacuum.

There are a lot of other users on here who seem quite satisfied with this product, but I wonder what kind of usage they go in for and if it requires the use of the sensor to keep it from driving down stairs or getting stuck under tables.  Ours most definitely does.  Or maybe it's a case of a ticking time bomb and the batteries will erode their sensors over time.  Or perhaps they have a different unit that these batteries affect differently and everything will be fine. If that's the case, then they are indeed lucky, but the Neato rep I spoke with said these batteries shouldn't be used in any of their machines.  I realize that this might be their way of trying ensure that customers only buy Neato products rather than third party accessories, but after what happened to my unit, I think they're telling the truth- these batteries ruin your machine.  In short, stay away from this product unless you're willing to gamble the life of your Neato on it.
1466132
The battery included in this kit is very sub-par in relation to the high quality of the DeLorme PN series handheld GPS receiver.  This receiver is wonderful but very power hungry.  A 1400mah battery for this receiver was a gross oversight by DeLorme.  The car charger and 110v wall charger are fine but the battery is a joke.  There is another rechargeable on the market called CabBat.  This battery will last all day according to my research 12-14 hours in the PN-20 & 40, even longer in the PN-60 which is more efficient.  As anyone that owns one of these devices can tell you, it's not at all practical to swap out batteries with this GPSr.  It's simply a hassle.
4226560
This is a great toy to keep your little ones busy, but only until the batteries run out.  I love this toy except for the fact it runs on batteries in the base/joy stick and the console.  There is only battery power and this can get very expensive when the kids forget to turn it off when they are fininshed playing with it. (Which is exactly what happened with ours on 2 occasions)
4822163
Fun and cool - but if you keep your bike outside do not expect them to last. Batteries died fast too. Would not buy again.
2246954
Fun toy. Have to "rev it up" to make it go fast (I am guessing those who gave it bad reviews for going slow did not do this). My only problem is that it is a total battery sucker.
2692319
I bought this RC car for my son and I to have fun with.  I liked the fact that it was capable of high voltage torque from the optional 9.6V battery pack, plus the option to use regular AA batteries at a more manageable power, 8.4v. The car was great fun for a few months of limited use.  However one day the motor was spinning freely with no movement.  Luckily i got the car to work afterwords by moving the car manually and getting the gearbox to engage the motor.  So we lived with that for a while, but used the car seldom. After a long winter, we brought the car out again.  It was working fine for the first minute but it just died.  The motor speed slowed to a crawl then stopped responding completely.  I changed all of the batteries in the car and controller, and that woke it back up for only 30 seconds, then dead again.  I've test all of the voltages; they were fine.

I am a mechanically minded guy, and tried to open the drive unit, but it is not meant to be serviced.  Now I have extra batteries and a cool looking dead RC in my garage.

I am very upset.

it was an awesome toy.

-extra note:  We were very careful not to abuse the RC, by crashing it or running it while it was wet out.
1379082
I loved the brightness of this light. It was amazing on walks and jogs at night. Sadly, the two I received both are terrible with batteries. Duracell, Energizer, even the ones it came with. You can only get 1.5 - 2 hours (over 2-3 uses) on the low setting before its dead. It likely can only work on full brightness for maybe 40 mins. Unacceptable for LEDs. I have another LED headlamp that gives me 6 to 8 hrs, but its 3 watt. Id rather have that.
1810716
Battery dies quickly but gorgeous while it is working
1309079
My daughter loved it and she has fun playing with it but when she's not using it the batteries drain dead even though it's put in the off position. I've gone through two sets of batteries and she's only play with it or maybe a full hour and a half total. I've had to take the door off and now remove the batteries after each use so they don't drain dead.
2250364
The batteries on constatnly running out. My kids like to leave them on so they can talk from different rooms in the house. They're 8 and 5 and have a lot of fun with these radios, however the battery situation has left me wishing I had purchased recharable units.
I'm not sure if it's specific to this product or all two-way radios, but we also get the occational 'phantom' voice that comes across. Freaks my kids out.. and of course I egg  them on to keep them guessing.. :)
But the batteries. Seriously.
4336776
DANGER! BATTERY PACK CAUGHT FIRE AFTER BEING EXPOSED TO WATER ACCIDENTALLY! BECAREFUL
4354788
The sounds are cute, the way the eggs fit into the carton (basically a shape puzzle) is educational for baby, the faces on the tops of the eggs are priceless (also educational because baby has to match the face on the top of the shell with the face on the chick)...BUT the toy requires three 1.5V button cell batteries! The total cost of the batteries equals half the cost of the entire toy! Since the batteries that came with the toy died after less than a month, we already spent too much on this toy...But the toy is a ton of fun; we just don't turn it on too often.