What's the smallest battery I can use to light up 9 of these?
524539
I think they would not work well in series as they contain controller chips. Hook them in parallel and run them at 3V with no resistor.
524540
Your question needs to be clearer - do you mean physical dimensions, voltage, capacity? Are you thinking of common batteries, such as AA, C, D, etc., or are you willing to use the less common ones like lithium coin cells or LiPos? How long would you like these to light before the battery is depleted? The community is happy to help you, but you need to provide more info on your requirements and limitations.
524541
Do you mean voltage or physical size?Each LED requires 2.4 volts. If all 9 are put in series, the voltage required is 21.6 volts.If all 9 are put in parallel, 2.3 volts is required?:Does this help?
524542
I haven't put any together in series. When I mentioned that I used two of the slowly changing (as opposed to FLASHING), they were separate LEDs pointing at slightly separate points on the ceiling. I used 2 AAs to power each light, and 3 AA batteries to make them very bright. Four exceeds their capacity. I threw that trial away.
1604889
I takes "AAAA" batteries. (Yes 4-A's, quadruple). There really is such a thing. Triple 'A' is too big for this slim light.
1006471
Go for the bigger ones. These are so small the light won't do much for you unless you want it fot mini lighting in/on your vehicle!
1000546
Saw somewhere it takes 6 x AAA batteries - don't know if you can use rechargeable ones.
1296118
Yes. You will need one a least. Six or eight is not out of the question either because, this will give you more electricity into the evening hours.
650485
It works well. But get the two smaller ones. The light will be brighter and has more voltage
1406981
I used 2 of Darice VL429 Non Blinking Mini Party Lites, White, 12 Per Pack Sold by Court House Supplies they were bright and lasted over 8 hours.
33456
These batteries are very small. I use them in my doorbell, since it is wireless.
1836929
73 give or take a few- mines not full at this time 8 d, 10 c, 9 9v, 26 aa, 10 aaa, and aprox 10 flat round batteries. I hope this helps
128281
Sorry to be so late. They are the size of a standard AA battery, not the short ones sometimes used in solar lights.
546882
There's a power in (-,+) which is visible in the picture on the lower right hand side (It's the little blue tower with only two things on it). I used 4 AA batteries. You should be able to use more then that but it's up to you I don't know the recommended voltages for this off hand.
165906
I use Surefire 123 batteries. You can buy them in bulk, both on Amazon and at the Surefire website.
1269384
Just a FYI A good place to get your AA batteries for this purpose is a little know fact about most types of small utility batteries .Most run a voltage of 1.5v and it is all a matter of how they are stacked and wired for the specific use and power.Knowing that and if your not afraid to put a little work into getting them all you need is to find one of the old style 6 volt Lantern battery, there like 3x3 square 4 inches tall with the screw on caps on top. If you take care and crack the top off cut the wires and out pours a pile of AA batteries. I forget the exact number but you can even find a video on you tube. Just a FYI A good place to get your AA batteries for this purpose is a little know fact about most types of small utility batteries .Most run a voltage of 1.5v and it is all a matter of how they are stacked and wired for the specific use and power.Knowing that and if your not afraid to put a little work into getting them all you need is to find one of the old style 6 volt Lantern battery, there like 3x3 square 4 inches tall with the screw on caps on top. If you take care and crack the top off cut the wires and out pours a pile of AA batteries. I forget the exact number but you... » Read More Just a FYI A good place to get your AA batteries for this purpose is a little know fact about most types of small utility batteries .Most run a voltage of 1.5v and it is all a matter of how they are stacked and wired for the specific use and power.Knowing that and if your not afraid to put a little work into getting them all you need is to find one of the old style 6 volt Lantern battery, there like 3x3 square 4 inches tall with the screw on caps on top. If you take care and crack the top off cut the wires and out pours a pile of AA batteries. I forget the exact number but you can even find a video on you tube. « Show Less
461354
Either one 18650 lithium battery or two CR123A batteries will do. My favorite flashlight because it is the brightest one for it's size. Plenty bright outdoors and brightness can be reduced for indoors. Nice wide beam. Fits in your pocket. Don't order from China though. I've gotten two pieces of junk from there. Pay a couple of extra dollars and order directly from Amazon. You won't be disappointed.
1507578
You can use a regular AA battery or you can use the rechargeable 3.7 volt battery. It works fine with the AA battery but it is quite a bit brighter using the 3.7 volt battery. With either battery it is a quite impressive little light for it's size. I have purchased several.
1447281
As I said in my original post, not very long. I tried multiple batteries from a 20-pack, and nothing would keep any of the three in pack lit for more than 10's of minutes. We went back to inexpensive moon lights, and haven't regretted it.
907427
Sorry, but I do not use regular 9v batteries. I always use high capacity 9v rechargeable battery like (iPower Pro). And they last about 8+ hours and take about 45 mins to recharge.