Laser pointer discussion. Read/write reviews of laser pointers and laser pointer companies. Learn about all types of laser pointers and lasers





Welcome to Laser Pointer Forums! If you are looking for a laser pointer or want to compare different laser pointer companies, you may want to check out the LPF Laser Pointer Company Database. The link will open in a new window for your convenience.








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes
Laser Technology Laser Pointer Parts Lasers by Wavelength
Top 10 Laser Pointer Companies Laser Pointer Company Database Visible Beam Laser Pointers


One laser store meets all your needs

























Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > Drivers, Test-load, Power Supply, & Batteries



LPF List of Laser Pointer Companies (link opens new window)



Reply
 
LinkBack Thread Tools Display Modes
Old 02-28-2011, 04:01 PM #1
Maros's Avatar
Class 1 Laser
 
Join Date: Dec 2010
Location: Missouri
Posts: 70
Rep Power: 7
Maros is on a distinguished road
Send a message via AIM to Maros
Maros Maros is offline
Class 1 Laser
Maros's Avatar
 
Join Date: Dec 2010
Location: Missouri
Posts: 70
Rep Power: 7
Maros is on a distinguished road
Send a message via AIM to Maros
Default 18650'S - UltraFire vs Laptop cell battery.

I bought the O-like 400mW 405nm bluray torch and just received it about a week ago. I also have 6 cells i took out of an old laptop battery which are 18650's.

I was just curious what the difference is between the two. Are they supposed to be the exact same battery? Can I substitute the old laptop 18650's for the ultrafire in my 405 torch?

The ultrafire puts out about 2.4v, The amount of amps it puts out is extremely variable, it starts out at about 2.5A and gets down to around 200mA. This seems pretty odd to me.

The laptop cell puts out about 3.8v, It starts out at 16.5A and gets down to 1.4A but it gets hot in the process. (This is just testing one of the 6 cells, The others registered about the same but that was just quick spot testing).

*** Edit ***

So, not sure what this is about, I know this is the wrong area for this but, I had my ultrafire plugged in to charge all night and tested it this morning with my DMM a few times and now my 405nm is fading to pretty much nothing when I click it on. Hopefully this is just the battery dying?


__________________
400mW 405nm (O-Like Blu-Ray Laser / Torch - Waterproof - Focusable) Review!!

5mW 635nm pen style

250mW 660nm DIY (lm317 driver + lpc 815 LD)

Finished my first Build! Click to see!

Last edited by Maros; 02-28-2011 at 04:08 PM.
Maros is offline   Reply With Quote







LPF List of Laser Pointer Companies (link opens new window)







Old 02-28-2011, 06:24 PM #2
Class 1M Laser
 
Join Date: Oct 2010
Location: Minnesota
Posts: 226
Rep Power: 17
Drew has much to be proud ofDrew has much to be proud ofDrew has much to be proud ofDrew has much to be proud ofDrew has much to be proud ofDrew has much to be proud ofDrew has much to be proud ofDrew has much to be proud of
Drew Drew is offline
Class 1M Laser
 
Join Date: Oct 2010
Location: Minnesota
Posts: 226
Rep Power: 17
Drew has much to be proud ofDrew has much to be proud ofDrew has much to be proud ofDrew has much to be proud ofDrew has much to be proud ofDrew has much to be proud ofDrew has much to be proud ofDrew has much to be proud of
Default Re: 18650'S - UltraFire vs Laptop cell battery.

2.4v is too low, sounds like the battery is toast. Any charged 18650 should be around 4.2v static (no draw). The laptop cells should be the same if they have the same dimensions. 3A is about the highest draw you should put on this type of battery, 16.5A is dangerous as lithium batteries have been known to explode. 3A might even be high for a laptop battery as different cells are made to discharge at different rates and laptops are long running devices
Drew is offline   Reply With Quote
Old 02-28-2011, 07:46 PM #3
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,141
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Cyparagon Cyparagon is online now
Class 4 Laser
Cyparagon's Avatar
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,141
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Default Re: 18650'S - UltraFire vs Laptop cell battery.

STOP!!

You will very likely blow up your batteries and sustain serious injury if you short-circuit them with your ammeter like that!

18650s Should not be discharged faster than 4A or so. Max current is NOT something you should test. Its a bit like testing the max speed of your car on the open road - it might not end well. Your O-like violet will not need much current. Either battery will work IF you charge it first and IF you haven't killed them already with your "test". ~4.2V is charged. 2.4V is not.
__________________
A problem well stated is a problem half solved.

Last edited by Cyparagon; 02-28-2011 at 07:50 PM.
Cyparagon is online now   Reply With Quote
Old 02-28-2011, 07:59 PM #4
BShanahan14rulz's Avatar
Class 3B Laser
 
Join Date: Dec 2009
Posts: 3,175
Rep Power: 264
BShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond repute
BShanahan14rulz BShanahan14rulz is offline
Class 3B Laser
BShanahan14rulz's Avatar
 
Join Date: Dec 2009
Posts: 3,175
Rep Power: 264
BShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond repute
Default Re: 18650'S - UltraFire vs Laptop cell battery.

When you test the current, in the 5A or 10A range of a multimeter, you are connecting the two electrodes with a piece of solid wire, about 3mm to 4mm in diameter. You are basically shorting the battery with a piece of wire.

Li-Ions can discharge many many amps in a short-circuit situation. However, they can only safely discharge much fewer amps, so the output must have a load, not just a short. Try not to do that test to anymore batteries, and if you can afford to, recycle the ones that you've already shorted. They may have sustained internal damage that would exhibit itself in various ways later on, such as poor performance, slow charging, and exploding while charging.
BShanahan14rulz is offline   Reply With Quote
Old 02-28-2011, 08:56 PM #5
Maros's Avatar
Class 1 Laser
 
Join Date: Dec 2010
Location: Missouri
Posts: 70
Rep Power: 7
Maros is on a distinguished road
Send a message via AIM to Maros
Maros Maros is offline
Class 1 Laser
Maros's Avatar
 
Join Date: Dec 2010
Location: Missouri
Posts: 70
Rep Power: 7
Maros is on a distinguished road
Send a message via AIM to Maros
Default Re: 18650'S - UltraFire vs Laptop cell battery.

Fail - Well ... that's good times. Hadn't had any issues but at least now I know. Time to order a new 18650 I suppose. Is this true for any type of battery or just these 18650's / Lithiums?
__________________
400mW 405nm (O-Like Blu-Ray Laser / Torch - Waterproof - Focusable) Review!!

5mW 635nm pen style

250mW 660nm DIY (lm317 driver + lpc 815 LD)

Finished my first Build! Click to see!
Maros is offline   Reply With Quote
Old 02-28-2011, 11:03 PM #6
BShanahan14rulz's Avatar
Class 3B Laser
 
Join Date: Dec 2009
Posts: 3,175
Rep Power: 264
BShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond repute
BShanahan14rulz BShanahan14rulz is offline
Class 3B Laser
BShanahan14rulz's Avatar
 
Join Date: Dec 2009
Posts: 3,175
Rep Power: 264
BShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond repute
Default Re: 18650'S - UltraFire vs Laptop cell battery.

almost all batteries don't like being shorted, it's just that lithium primaries and secondaries are capable of much higher currents, and hence much higher powers. Not to mention their "catastrophic failures." When's the last time you saw an alkaline or an Eneloop explode like a pipe bomb or spit fire like a blowtorch?
BShanahan14rulz is offline   Reply With Quote
Old 03-01-2011, 03:52 PM #7
LarryDFW's Avatar
Class 3R Laser
 
Join Date: Dec 2008
Location: Dallas, TX
Posts: 1,577
Rep Power: 128
LarryDFW has a reputation beyond reputeLarryDFW has a reputation beyond reputeLarryDFW has a reputation beyond reputeLarryDFW has a reputation beyond reputeLarryDFW has a reputation beyond reputeLarryDFW has a reputation beyond reputeLarryDFW has a reputation beyond reputeLarryDFW has a reputation beyond reputeLarryDFW has a reputation beyond reputeLarryDFW has a reputation beyond reputeLarryDFW has a reputation beyond repute
LarryDFW LarryDFW is offline
Class 3R Laser
LarryDFW's Avatar
 
Join Date: Dec 2008
Location: Dallas, TX
Posts: 1,577
Rep Power: 128
LarryDFW has a reputation beyond reputeLarryDFW has a reputation beyond reputeLarryDFW has a reputation beyond reputeLarryDFW has a reputation beyond reputeLarryDFW has a reputation beyond reputeLarryDFW has a reputation beyond reputeLarryDFW has a reputation beyond reputeLarryDFW has a reputation beyond reputeLarryDFW has a reputation beyond reputeLarryDFW has a reputation beyond reputeLarryDFW has a reputation beyond repute
Default Re: 18650'S - UltraFire vs Laptop cell battery.

Maros;

A fairly new laptop cell in good condition should deliver 4.2 VDC.

Laptop cells have a finite life of ~ 5 years, or 300 charges,
whichever comes first.

All multi-amp cells can malfunction when directly shorted.

I've seen ni-cads catch fire.

Educate yourself on cell handling, before you abuse them.

Larry
__________________
UV LED Lights F/S, 445nm, Blu-Rays, Red 1/2W, Green Focusables,
Link- Blu-Ray/445 Diode Test Current Levels for Long Life

Last edited by LarryDFW; 03-03-2011 at 05:48 AM.
LarryDFW is offline   Reply With Quote
Old 03-02-2011, 09:27 PM #8
Maros's Avatar
Class 1 Laser
 
Join Date: Dec 2010
Location: Missouri
Posts: 70
Rep Power: 7
Maros is on a distinguished road
Send a message via AIM to Maros
Maros Maros is offline
Class 1 Laser
Maros's Avatar
 
Join Date: Dec 2010
Location: Missouri
Posts: 70
Rep Power: 7
Maros is on a distinguished road
Send a message via AIM to Maros
Default Re: 18650'S - UltraFire vs Laptop cell battery.

Lol I've not seem them do that, In person any way. Is it possible to put some sort of test load between the DMM leads and the battery? Or is that just the same or not worth it?
__________________
400mW 405nm (O-Like Blu-Ray Laser / Torch - Waterproof - Focusable) Review!!

5mW 635nm pen style

250mW 660nm DIY (lm317 driver + lpc 815 LD)

Finished my first Build! Click to see!
Maros is offline   Reply With Quote
Old 03-03-2011, 04:08 PM #9
chipdouglas's Avatar
Class 3B Laser
 
Join Date: Dec 2008
Location: Riverside, California
Posts: 4,011
Rep Power: 347
chipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond repute
Send a message via Yahoo to chipdouglas
chipdouglas chipdouglas is offline
Class 3B Laser
chipdouglas's Avatar
 
Join Date: Dec 2008
Location: Riverside, California
Posts: 4,011
Rep Power: 347
chipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond repute
Send a message via Yahoo to chipdouglas
Default Re: 18650'S - UltraFire vs Laptop cell battery.

the best bet is to just do voltage tests. but that isn't fool proof either. i have had batteries read full juice but deliver no current. =(

michael.
__________________
IN A CONSTANT STATE OF PICNIC

I AM THE STATUS QUO

ARE YOU A NEW MEMBER, OR EVEN MORE, ARE YOU NEW TO ONLINE FORUMS... READ THIS
LASER POINTER FORUM ETIQUETTE


for pot modding facts click below

http://laserpointerforums.com/f51/pot-modding-faqs-40510.html
chipdouglas is offline   Reply With Quote
Old 03-07-2011, 11:43 PM #10
Seoul_lasers's Avatar
Class 3R Laser
 
Join Date: Jul 2008
Location: Victoria, British Columbia
Posts: 2,313
Rep Power: 5175
Seoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond repute
Send a message via Skype™ to Seoul_lasers
Seoul_lasers Seoul_lasers is online now
Class 3R Laser
Seoul_lasers's Avatar
 
Join Date: Jul 2008
Location: Victoria, British Columbia
Posts: 2,313
Rep Power: 5175
Seoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond repute
Send a message via Skype™ to Seoul_lasers
Default Re: 18650'S - UltraFire vs Laptop cell battery.

Quote:
Originally Posted by Maros View Post
I bought the O-like 400mW 405nm bluray torch and just received it about a week ago. I also have 6 cells i took out of an old laptop battery which are 18650's.

I was just curious what the difference is between the two. Are they supposed to be the exact same battery? Can I substitute the old laptop 18650's for the ultrafire in my 405 torch?

The ultrafire puts out about 2.4v, The amount of amps it puts out is extremely variable, it starts out at about 2.5A and gets down to around 200mA. This seems pretty odd to me.

The laptop cell puts out about 3.8v, It starts out at 16.5A and gets down to 1.4A but it gets hot in the process. (This is just testing one of the 6 cells, The others registered about the same but that was just quick spot testing).

*** Edit ***

So, not sure what this is about, I know this is the wrong area for this but, I had my ultrafire plugged in to charge all night and tested it this morning with my DMM a few times and now my 405nm is fading to pretty much nothing when I click it on. Hopefully this is just the battery dying?
Any Li-ion cell putting out 2.4v is a bomb in the charger! Get rid of the cell and replace with a protected cell or new cell.
3.5v is generally cut off for 0 charge.
__________________
650nm ~350mW DVD 20x diode RyanSoh3 Class IIIb
650nm ~350mW DVD 22x 3.5mm labby build 2010 Class IIIb
532nm 10mW-15mW DPSS Module IR filtered(S.Korea)RyanSoh3 Class IIIb
450nm CarbonFiber ElectricPlasma build 9mm +6W Class IV
445nm 3.49W pk ~3.15W av. Sinner Cypreus II +DTR 9mm 445nm Class IV
445nm RHD Saber Twins 2.7W ~2.35W pk Class IV
445nm A140 module x2 Maxsink Class IV
405nm Daguin Kryton Groove SO6J 700mW build. Class IV
405nm Olike 560mW-600mW pen sold Scopeguy20
Class IV
337.1nm TEA Nitrogen laser project 2011 Class IIIb
---------------------------------------------------
Die4Drivers 1.3v lab laser/projector driver

Laserbee 3.2W Deluxe LPM
ARGMeter 1.1v
Ophir 20C-A sensor

Peregrine 1.5.0 is working now on MacOSX Yay!!
Seoul_lasers is online now   Reply With Quote
Old 03-08-2011, 03:58 PM #11
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,141
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Cyparagon Cyparagon is online now
Class 4 Laser
Cyparagon's Avatar
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,141
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Default Re: 18650'S - UltraFire vs Laptop cell battery.

According to the label on a couple of batteries I'm looking at right now, the cutoff is 2.8V.
__________________
A problem well stated is a problem half solved.
Cyparagon is online now   Reply With Quote
Old 03-08-2011, 08:08 PM #12
BShanahan14rulz's Avatar
Class 3B Laser
 
Join Date: Dec 2009
Posts: 3,175
Rep Power: 264
BShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond repute
BShanahan14rulz BShanahan14rulz is offline
Class 3B Laser
BShanahan14rulz's Avatar
 
Join Date: Dec 2009
Posts: 3,175
Rep Power: 264
BShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond repute
Default Re: 18650'S - UltraFire vs Laptop cell battery.

2.7V, 2.8V, 2.6V, either way, if it's below 3.6 resting, charge it.

Also, there's a thread already on how to judge the health of your Li-Ions, and it's stickied, IIRC.
BShanahan14rulz is offline   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On











Loading








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes






Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 05:59 AM.


Powered by: vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC