can you use a 9 volt battery with these?
1304354
Not directly. The motors are 3 volt motors and if you provide higher voltages, the motors will be damaged over time. The kit comes with a battery holder for 2 AA batteries. If you absolutely need 9 Volts, you can either look for 9 volt replacement motors or use an inexpensive voltage converter. These guys http://www.pololu.com/ have a great selection and they may even have replacement motors.
1304355
You can send power to the motors a number of ways. They are just DC motors, so a 9V battery will spin the motors, but it will be sending higher voltage than the 1v to 6v that the motor expects. That can be detrimental to the motors. This kit is best sent power and commands by a motor shield on an Arduino, or a Motor Hat with a Raspberry Pi, as a part of a larger RC or robotic project.
1304356
It says to use 3 volts. I have mine running a little robot set to 5 volts with no issue. The added power changes the final speed because the motor goes faster. It also gets hot quicker. So you can use it with 9 volts, but it will shorten the life of the motor.
1304357
I knowingly tried using a 9 volt battery with PWM, just for getting a project started, knowing I should get the 3 volt battery. I spun one of the gears right off the motor! Stick with 3 volts.
328581
these batteries are slightly thicker than the usual ones, however if you have room in the battery case, they should be fine. Electronically there is no problem whatsoever for these to work, and if you have a different plug you can just replace that. these batteries last me 2 and half times the regular supplied batteries that are 1500 MAH
339972
Absolutely! I use these, among other things, to replace the 900 mAh batteries that come in some of the solar lights.
1567123
Yes. You can use the 12 or the 20 volt battery. The 20 volt works best and will last longer.
1679842
Don't do it! The excess voltage would surely burn something out. (If they even fit.) There are numerous suitable "double A" batteries that will work, including many rechargeable ones.
1136162
Yes, the cheap battery that came with it died quickly. Yes, they now have a 9V rechargeable by Energizer. They have rechargers on Amazon for about $10.
560131
I know a 9v batt works. I think it would work with anything over 5v just get whatever gives the highest amp hour.
1698527
Yes, they are standard 9 volt batteries. They are just the professional grade Duracell.
1803784
These are 12 volt not 120 volt! With that said you could use a 12 volt DC transformer or a 12 volt battery
848976
I dont see why not. I bought two packages of these batteries. they work very well.
184666
Nope, any 9v should work. I'm using a one spot power supply on it right now
1841887
I can't imagine why not. We haven't just because I grabbed regular batteries instead but I'm sure we will eventually. The batteries we are using have lasted quite a while with steady use.
1029246
they aren't full 9 volts. all of the devices i use them in work fine on their voltage. i just checked 1 of my spares that has ben sitting since feb and after 6 months it has 8.23 volts on a volt meter and on a battery checker it's meter is is as high in green as it goes. For us these last longer than any others we used rechargeable or none that's why we had one that's ben sitting 6 months
1630056
These will still work. The fact that these are 900mah should mean they will last longer, but deliver the same 2.4v worth of power.
1044091
Yes, you need to purchase the adapter or a 9 volt battery. I recommend the adapter.
138242
If battery is at least 5 volts and gauge does not respond when connected then gauge is bad. My recollection is, there is nothing to adjust or set up on these. Just the two wires.Max 30V so don't connect to wall outlet! (duh, these are DC anyway).I'd test by finger-pressing the stripped ends of the leads directly on the tips of the 9V battery.A regular 12V car battery would also have contacts available for testing, in most cars.
820369
literally, yes. But if you have rechargeable batteries, why not give them a try. If they're 1.5V, they ought to work.