what size batteries does it use?
1160245
Three (3) batteries come with the item, and it takes three (3) to operate the laser trainer. Easy to use, easy to replace batteries and the size of battery is 377. Batteries are available at stores that sell watch batteries(walmart, batteries-plus, etc).
1411082
4 or 6 "C" batteries. I can't recall exactly at the moment, but I'm almost certain it's 4. There is also a power adaptor input plug in case you want to mount it near a power source.
1900832
It uses 4 batteries. I've been using mine for 2 months and the batteries are still going strong. You may only have to replace them twice a year.
1738002
The battery is approximately 2x2 inches. Comes with nylon sleeve to hold it and strap on to bike frame. Very light weight, maybe same weight as 5 AA batteries in your hand. It's a super bright light. Comes with headband that is too small for most adults. I only use it on bike anyway. Overall, I love it.
48044
I want to say that it uses only one AA size battery. I love this timer for my desk at work, since it is very user friendly and gives me a 10 min and a 5 minute warning beep too. Hope this helps :)
1348065
Well, I do not have it before me right now. But it is about the size of an adult male hand. You did not ask, but it works great and is well worth the money. Just keep spare batteries with you, it is not battery hungry, but if you need the device and you don't have spares...well I have been in that situation.
1368019
About a half an inch. Don't go by the physical size. There are other batteries of the same size. Find out what you actually need.
95448
To anyone else wondering the same thing to this question. It uses 2 AAA batteries. I didn't see the details about this anywhere else on the page about this. But if you are wondering the same thing I did then this is the answer. 2 AAA batteries. I'm contacting Amazon.com regarding the person who answered me and let them know that there are trolls on http://amazon.com. Little kids should not be allowed to answer questions.
10301
it uses AAAA batteries. A little harder to find than some, but not that bad.
1688282
Its small round flat battery (3/4 inch diameter about the size of a quarter) that is supplied with the scale (not a typical AA or AAA type battery). We have had the scale for about a year and haven't had to replace it.
787619
It takes batteries- I will have to check which size, but we have not had to replace the batteries at all so far.
543451
It uses.l.r.44 .g.h.battery. Its small but popular at jewelry counters.takes two.
108455
I don't recall what battery it uses as it only worked a couple of times despite replacing the battery, so I got rid of it. What can one expect from something so inexpensive while still making a profit off it? It was cheap in price and cheaper in actuality. Don't bother getting it.
1589202
It uses the 18650 batteries. They are sold on Amazon. Be sure to get the RECHARGABLE ones. They are much larger than the AA batteries.
418273
Its a small watch type battery about 1/8th inch thick and about 1/8th inch smaller diameter than a dime. It takes 3 batteries each of its 2 devices. I hope this answers your question.
541886
it is about the size of a c battery and about 6 inches....we sent ours back it wouldn't focus when we had it fully extended...the packaging on it wasn't great either.
933409
It only uses batteries. I have used mine for about 10 hours without the need to change batteries