hey there.

Today I bought a 100 mW 532 nm green laszer pointer labelled King shark.
the batteries came with were working kinda good but they died soon.
So I have two questions, one am I get robbed ? is that a good lazer ? ( I bought it 15$)
second what kind of batteries do I need to use for lighting matches ?
Ty all.

1. Provide a link to the laser you're talking about or more information about it. There are thousands of lasers out there...

2. For $15 you didn't get robbed.

3. Refer to #1 - Provide more information. Most likely the answer is no it's not, but for $15 you're not exactly aiming high.

4. Refer to #1 - Your laser might use AA's or 22650 batteries for all we know. Provide more information.

InfinitusEquitas said:

1. Provide a link to the laser you're talking about or more information about it. There are thousands of lasers out there...

2. For $15 you didn't get robbed.

3. Refer to #1 - Provide more information. Most likely the answer is no it's not, but for $15 you're not exactly aiming high.

4. Refer to #1 - Your laser might use AA's or 22650 batteries for all we know. Provide more information.

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well it wasnt 15$. there was a discount from 31$.
I will fill more info soon

alright. in specifications on paper of product it says:
batteries: 2x1.5volt [AAA]
output Mode: constant Wsve
Lazer Wave Lenght: 532 nm
output power: <1mW <5mW <10mW <20mW <30mW <40mW . . . <90mW and <100mW

Class III Lazer Product
This product complies with 21 CFR

Does it look like this? If so it probably isn't focusable which will make it harder to light matches, especially if it is underspecification in actual mW power output.

Edit: What does the power say on the actual pointer, that instruction paper is a one size fits all for all types of models.

yes it looks like that and I cant see any beam either in the night

ElectroMagneticFreak said:

Does it look like this? If so it probably isn't focusable which will make it harder to light matches, especially if it is underspecification in actual mW power output.

Edit: What does the power say on the actual pointer, that instruction paper is a one size fits all for all types of models.

Click to expand...

it says max output power <100mW

If you can't see any beam at night and it is a green laser it is VERY underspec or there is something majorly wrong with it. If it was 100mW it would have an extremely visible green beam. I have a 30mW 532nm that has a very visible beam, and although I do not own own a 5mW I believe you are supposed to be able to see the beam of even something that lowered powered in 5mW green. (532nm)

Very odd your beam is not visible at night. There is something very wrong with it.

One thing important to know though is that green lasers produce their green color with the use of INVISBLE Infrared light, that is converted to green. Sometimes what can happen is the crystal that converts the invisible IR beam gets out of alignment etc. and it still is blasting out IR but it is very dim green or none or even a dim red light.

This is extremely dangerous and you actually cannot see the invisible beam of IR that could greatly damage your eyes if you were to point the dim looking laser towards your eyes, or even stare at the dim looking spot produced on the wall.

ElectroMagneticFreak said:

If you can't see any beam at night and it is a green laser it is VERY underspec. If it was 100mW it would have an extremely visible green beam. I have a 30mW 532nm that has a very visible beam, and although I do not own own a 5mW I believe you are supposed to be able to see the beam of even something that lowered powered in 5mW green. (532nm)

Very odd your beam is not visible at night. There is something very wrong with it.

One thing important to know though is that green lasers produce their green color with the use of INVISBLE Infrared light, that is converted to green. Sometimes what can happen is the crystal that converts the invisible IR beam gets out of alignment etc. and it still is blasting out IR but it is very dim green or none or even a dim red light.

This is extremely dangerous and you actually cannot see the invisible beam of IR that could greatly damage your eyes if you were to point the dim looking laser towards your eyes, or even stare at the dim looking spot produced on the wall.

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well Im using the batteries it says but its working like a 5mW :S Its original selling prize is 30$ is that normal _?
and will there any change if I use litium batteries_?

efyuar said:

well Im using the batteries it says but its working like a 5mW :S Its original selling prize is 30$ is that normal _?
and will there any change if I use litium batteries_?

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If it was actually 100mW then $30 is a good deal. I believe some people have said that Lithium can produce slightly too high voltage, although I could be wrong. I would just try regular new alkaline batteries, or AAA rechargeable NiMH.

If it is only a 5mW pointer then you can get them for much cheaper like $8 or less. However a lot of 5mW pointers are over spec and therefore not "Eye Safe" because they are over 5mW and can actually be like 30mW or more.

Anything over 5mW your eye cannot blink and or you can't look away fast enough not to do damage from a direct hit, reflection etc.

With your laser it is possible it is :

1) Misaligned Crystal etc. = Actually putting out much higher but invisible power in mW. (Can be very dangerous)

2. Try new batteries

3. Some kind of problem with the driver possibly??

4. Just simply underspec.

Don't assume it is not problem #1 unless you have a LPM to test the actual power of your laser which will measure all light (invisible and green.)

Another thing you could try is taking a picture of the dot. I think you can see the IR as a pinkish glow on photos using cameras that don't have an IR filter built into them.

Remember though it could be dangerous to stare at the spot because there is invisible IR you are not aware of.

thx alot but I used every kind of batteries I think something wrong with the laser I m gonna send it back for shamed product so they can send me back a new one.
I watched the exacly same product videos and mine is so far like it.

Your welcome!

Good idea to send it back! Also don't forget to get a pair of goggles if you are going to be getting another laser above 5mW. You will need goggles for the correct laser spectrum and they are pretty much a must if you are going to be using a non eye safe laser indoors. Especially for burning you will need sufficiently good quality goggles. If your laser is a green non IR filtered one you will either need to get an IR filter to attach to the laser (o-like.com has some) or go to Survivallaser to get a pair of goggles that dual protect from IR and 532nm green.

Eagle Pair® 190-540nm & 800-2000nm Laser Safety Goggles

Another option would be getting a red laser for burning and then you wouldn't need to worry about protecting from two spectrums because there is no IR in red lasers. Then you would need some blue colored goggles to protect from the red. Survival has these or you could go to OEMLASERSYSTEMS for goggles.

If you want to just enjoy the beam though the green would be the best bet for beam visibility but you will need to worry about IR with green but not with red.

http://www.oemlasersystems.com/product-catalog/laser-eye-protection

i thought one with more than 100w output power can light things. is it related to batteries?

My 50mW can light matches and pop balloons

I would send it back . I have a cheap 5mw green and I can see the beam on it in the day. In a room with the lights on. It's not super bright , but ya can see it. Ya probably just got a dud. It happens with all things cheap.