Which 18650 battery for my new laser?

I just bought this green 500mw laser from laserpointerpro.com
Now, i am aware that the 500mw claim can be false and it could be a 50mw laser, but im taking that risk. It comes with an ultrafire 18650 4000mAh which i read is complete bs, so what battery should i run in this laser to get the most power of out it? I was looking at the protected panasonic 18650s, but those are less then 4k mAh. Is there any good brand that is truly 4k mAh and or doesnt lie about the mAh rating? Here is the laser i bought, Thanks! 500MW Beam Green Laser Pointer (1 x 4000mAh) Red at Laserpointerpro.com

Onision said:

I just bought this green 500mw laser from laserpointerpro.com
Now, i am aware that the 500mw claim can be false and it could be a 50mw laser, but im taking that risk. It comes with an ultrafire 18650 4000mAh which i read is complete bs, so what battery should i run in this laser to get the most power of out it? I was looking at the protected panasonic 18650s, but those are less then 4k mAh. Is there any good brand that is truly 4k mAh and or doesnt lie about the mAh rating? Here is the laser i bought, Thanks! 500MW Beam Green Laser Pointer (1 x 4000mAh) Red at Laserpointerpro.com

Click to expand...

$25.99!!! that is cheap Chinese bullshit. A 500mW 532nm will cost several hundred dollars. That is a low power laser and any battery including the one you have should work fine.

Alan

''Wave Length 500mw'' should say enough about the quality lol...

just fyi there is no such thing as a 4000mah 18650 that ultrafire might be 1500-2000mah if you are lucky.

I have some Panasonic and sony cells both perform well.

most ultra fires are 1800 to 2400 mah

mAh means how long will last your battery... anyway even that battery seems to be fake.

as many sites wont ship to uk , i have recently purchased 3 lasers but
what is the best battery 18650
and charger to get and from where
uk please

It really doesn't matter too much, some 18650s have a rating for how much power they can put out (max discharge rating I think), but I don't think that's ever really a problem. Diodes that need more power will call for 2 batteries so it doubles the voltage. Any 18650 should work, and even if you used a "high" and "low" quality 18650 I doubt the power would change by anything significant. Definitely less than you could see visually. Battery quality is only really important with AAA pen lasers. Just keep the 18650 fully charged and you shouldn't have any problems. I do have some extra panasonic batteries and chargers available though if your interested. Check out my ebay listing. I tested the capacity and they are right around what they should be. I would rather sell them here though to avoid the ebay fees.

EDIT :
Sorry didn't realize this was from 2014 until now, my bad. But my comment still applies so yeah...

im in uk whats ur price?
2 batteries and charger
not sure if i need charger though.........i think mines ok

i see your listing in usa