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Old 08-13-2017, 04:27 AM #1
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Wink Does laser 301 series work with CR123A batteries?

Hello guys, I have a question. Can I use CR123A batteries with my 301 lasers(violet 100mw,green 80mw?

Thanks for reading


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Old 08-13-2017, 07:51 PM #2
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Default Re: Does laser 301 series work with CR123A batteries?

the 301 and 303 pointers screw apart in the middle and you can take a part off of the battery compartment for use with a 16340 or cr123a's
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Old 08-13-2017, 08:03 PM #3
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Default Re: Does laser 301 series work with CR123A batteries?

IIRC, CR123As are 3 volt batteries. You should be using a 4.2 volt rechargeable battery with the 532nm at least.
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Old 08-13-2017, 08:05 PM #4
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Default Re: Does laser 301 series work with CR123A batteries?

Quote:
Originally Posted by paul1598419 View Post
IIRC, CR123As are 3 volt batteries. You should be using a 4.2 volt rechargeable battery with the 532nm at least.
i have used a cr123a with my 303 greenie and i dont see any difference at all in brightness or burning capabilities
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Old 08-13-2017, 08:10 PM #5
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Default Re: Does laser 301 series work with CR123A batteries?

Well, whether you notice it or not, there is a difference. CR123As are not rechargeable and measure 3 VDC as apposed to a rechargeable Li-ion battery that will measure 4.2 VDC when fully charged. That is a full 1.2 volt difference, and the 808nm drivers won't output as much power using CR123As.
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Old 08-13-2017, 08:40 PM #6
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Default Re: Does laser 301 series work with CR123A batteries?

I see, what about those RCR123 batteries?, I was reading somewhere that those batteries are better than the CR123a since those are rechargeable

PD: It is hard to find a good 16340 or 18650 nice battery but the RCR123 batteries itīs easier to find high quality ones.
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Old 08-13-2017, 10:04 PM #7
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Default Re: Does laser 301 series work with CR123A batteries?

I'm not familiar with the RCR123 batteries, but 16340s are the same size and can be had in 700 mAh capacity. I have some CR123As and they state 3 VDC right on the side.
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Old 08-14-2017, 08:55 PM #8
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Default Re: Does laser 301 series work with CR123A batteries?

Quote:
Originally Posted by paul1598419 View Post
the 808nm drivers won't output as much power using CR123As.
Most of the green drivers I've seen are LDO. With a Vf of ~1.9V, what makes you think 1V or so isn't enough headroom for a LDO? Some of the green drivers I've tested go all the way down to 2.2V while maintaining their current regulation.

I have a couple of these lying around somewhere, so I'll have to test that. Unless the drivers in these are somehow worse than the other chinese stuff, I suspect you're quite wrong.
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Old 08-14-2017, 10:05 PM #9
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Default Re: Does laser 301 series work with CR123A batteries?

My experience with these cheap 532nm lasers like the 301s and 303s is the drivers in these are not as good at regulating current as well as one might want. For that reason, I have found the output is determined by the input voltage to these cheap drivers. It has nothing to do with the Vf of the pump diode.........just a noticeable difference in the power output when driven with these ubiquitous drivers. Also, the OP is using it for a 405nm and the boost driver in that circuit might be close to cut off at 3 volts.
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Old 08-18-2017, 07:58 PM #10
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Default Re: Does laser 301 series work with CR123A batteries?

I got around to checking a "303" just now. Mine's fine at low voltage.

4.2V input yields 325mA
2.8V input yields 320mA
2.65V input yields 300mA
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Old 08-19-2017, 01:26 AM #11
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Default Re: Does laser 301 series work with CR123A batteries?

nice data cyparagon. so if some drivers are affected by the lower voltage and some arent... has anyone tested something similar with survival lasers 1.25A driver? thats the one that will be in my 638 build and was wondering if the difference in voltage would affect that driver much. im gonna buy myself some 16340s on amazon either way since my local battery store only sells rcr123s and the vape shop nearby overinflates the prices on their batteries.
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337nm : ?mw (this thing is LOUD)
405nm : 20mw
445nm : 1000mw
505nm : planned
532nm : 40mw
635nm : 5mw (thanks hap )
638nm : 1000mw (post incoming)
650nm : planned
808nm : 500mw

495nm is best color


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Last edited by Merpie101; 08-19-2017 at 01:27 AM.
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Old 08-19-2017, 01:46 AM #12
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Default Re: Does laser 301 series work with CR123A batteries?

Good drivers should have no effect as they regulate the current to the laser diode. As long as there is enough voltage to drive the diode, it should remain constant. If the battery doesn't have the current to drive a diode, then I'm not sure if the battery voltage will sag, or the driver just won't pull the current and stop regulating.
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477nm 127 mW 501B
488nm Uniphase #2201-20SLAT argon laser head and power supply >40mW
520nm LaserLands pointer Measures 510nm
532nm LSR532H-1W Laser, LSR-PS-N1 Driver, RS-75-5 P.S. 1300 mW
532nm 200mW Thermostatically Controlled Fan Cooled (Besram) >230mW
532nm 189mW pocket lab laser
532nm lasers X6 100mW-200mW
532nm lasers X4 75mW- 140mW
632.8nm P210 New Laser Tube 0.57mW Melles Griot 05-LMP-827-037 PS
632.8nm Spectra- Physics He- Ne #102-2 4mW heads X2 and #236 power supply
632.8nm PMS He-Ne # 201P/ LPS-115 2mW
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635nm 5mW pointer
635nm 100mW pointer
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650nm 65mW pointer
650nm 380mW 501B
808nm 1+W infrared laser
infrared video camera for collimating IR lasers
Ocean Optics USB2000 Spectrometer
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Last edited by paul1598419; 08-19-2017 at 01:53 AM.
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Old 08-19-2017, 01:57 AM #13
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Default Re: Does laser 301 series work with CR123A batteries?

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Originally Posted by Cyparagon View Post
I got around to checking a "303" just now. Mine's fine at low voltage.

4.2V input yields 325mA
2.8V input yields 320mA
2.65V input yields 300mA
Doesn't that show the power output is dropping with input voltage ?
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Old 08-19-2017, 01:59 AM #14
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Default Re: Does laser 301 series work with CR123A batteries?

Quote:
Originally Posted by Accutronitis View Post
Doesn't that show the power output is dropping with input voltage ?
a 1.55V difference only dropped current by 25ma which isnt much at all
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Old 08-19-2017, 02:29 PM #15
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Default Re: Does laser 301 series work with CR123A batteries?

Quote:
Originally Posted by Merpie101 View Post
a 1.55V difference only dropped current by 25ma which isnt much at all
True but what did it start at ?
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My very short laser collection (for now)

Thor "Saber" Americanised Thor M II - DTR M462 2.2 Watt 462mn Diode W/Super X-Drive @ 1.8 Amps - DTR G-2 lens - LSP 4X Cylindrical Lens Pair Fast Axis Correction w/ Custom Made Beam Expander w/Jetlaser Output Lens Class IV

"Thor's Hammer" Americanised TLY-L201 Host Build W/Old School NASA Type Safety Switch - DTR NUBM44-81 8+ Watts at 4.5 Amps 450nm Diode In A 25mm Copper Module W/Driver - DTR G-2 lens - OPT Laser 6X Cylindrical Lens Pair Fast Axis Correction w/ Custom Made Beam Expander w/Jetlaser Output Lens Class IV

303 Prome Star Series Green Laser 532nm 80mW DPSS Class IIIb
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Old 08-19-2017, 04:21 PM #16
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Default Re: Does laser 301 series work with CR123A batteries?

Quote:
Originally Posted by Accutronitis View Post
True but what did it start at ?
the top of cyparagons list id say. 4.2V is what 3.7V liion batteries seem to max when fully charged
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337nm : ?mw (this thing is LOUD)
405nm : 20mw
445nm : 1000mw
505nm : planned
532nm : 40mw
635nm : 5mw (thanks hap )
638nm : 1000mw (post incoming)
650nm : planned
808nm : 500mw

495nm is best color


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