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 > Buy, Sell, & Trade



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



Reply
 
LinkBack Thread Tools Display Modes
Old 11-04-2011, 08:42 AM #1
ginhev123's Avatar
Class 2M Laser
 
Join Date: Nov 2010
Location: BR
Posts: 517
Rep Power: 22
ginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud of
ginhev123 ginhev123 is offline
Class 2M Laser
ginhev123's Avatar
 
Join Date: Nov 2010
Location: BR
Posts: 517
Rep Power: 22
ginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud of
Default Looking for CR2 unprotected batteries..

Hello!

I recently bought a dilda from DealExtreme and some CR2 batteries and it seems they are just to big to fit, I bought those Lifepoh 3.2V thing but it needs 3V it says and I guess my batteries are protected and thats why they don't fit (like a green outer layer)..

So I'm wondering, does anyone have normal CR2 3V batteries (2 pieces) and maybe a charger?

I live in Sweden.

I just don't wanna wait for a new DealExtreme package and the batteries here in Sweden costs $22 a piece..

Thanks.


ginhev123 is offline   Reply With Quote







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







Old 11-05-2011, 05:11 AM #2
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: Looking for CR2 unprotected batteries..

I don't think this is possible:

- Rechargeable
- 3.0V
- No internal battery circuitry adding bulk

As far as I'm aware, lithium ion rechargeable cell chemistry implies a nominal cell voltage of ~3.7V, except for LifePo4 which is a bit lower. But to get the 3V that we see from "3V" rechargeable lithium ions, there's some sort of little (buck? linear?) regulator on a chip inside the cell.

At least, that's what I remember reading on CPF many years ago before the rechargeable 3V cells were really out there.
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)

rhd is offline   Reply With Quote
Old 11-05-2011, 09:52 AM #3
Nocturnal's Avatar
Class 1M Laser
 
Join Date: Apr 2011
Location: Brisbane, Queensland, Australia, Earth.
Posts: 159
Rep Power: 12
Nocturnal is a glorious beacon of lightNocturnal is a glorious beacon of lightNocturnal is a glorious beacon of lightNocturnal is a glorious beacon of lightNocturnal is a glorious beacon of lightNocturnal is a glorious beacon of light
Nocturnal Nocturnal is offline
Class 1M Laser
Nocturnal's Avatar
 
Join Date: Apr 2011
Location: Brisbane, Queensland, Australia, Earth.
Posts: 159
Rep Power: 12
Nocturnal is a glorious beacon of lightNocturnal is a glorious beacon of lightNocturnal is a glorious beacon of lightNocturnal is a glorious beacon of lightNocturnal is a glorious beacon of lightNocturnal is a glorious beacon of light
Default Re: Looking for CR2 unprotected batteries..

I used eBay Australia: Buy new & used fashion, electronics & home d and eBay Australia: Buy new & used fashion, electronics & home d for my dilda. Are you sure your not using cr123's? The batteries I linked are 3.7v @ full charge, NOT 4.2v, so they are defined as 3v
__________________
532nm-100mW Focusable Host
660nm-100mW Flashlight host

DIY 5mW-200mW Focusable Green Laser Pointer Tutorial

Upcoming: 445nm ~1.6W Saik,
All power ratings are estimates,Will insert powers when I finish my LPM
Aussie Laser Laws
Nocturnal is offline   Reply With Quote
Old 11-05-2011, 10:03 AM #4
ginhev123's Avatar
Class 2M Laser
 
Join Date: Nov 2010
Location: BR
Posts: 517
Rep Power: 22
ginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud of
ginhev123 ginhev123 is offline
Class 2M Laser
ginhev123's Avatar
 
Join Date: Nov 2010
Location: BR
Posts: 517
Rep Power: 22
ginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud ofginhev123 has much to be proud of
Default Re: Looking for CR2 unprotected batteries..

Quote:
Originally Posted by Nocturnal View Post
I used eBay Australia: Buy new & used fashion, electronics & home d and eBay Australia: Buy new & used fashion, electronics & home d for my dilda. Are you sure your not using cr123's? The batteries I linked are 3.7v @ full charge, NOT 4.2v, so they are defined as 3v
Well, I made a mistake it turns out.

I had purchased dual CR123A's and thats the problem. I kept asking why did I do it and it turns out that the DragonLasers Spartan that is on its way needs CR123A's so I had purchased them for that.. Now I ruined one of the batteries by removing the green thing around them.

Oh well, bought a new pair + new pair for the dilda.

"The mistake that netted me a CR123A battery" haha.
ginhev123 is offline   Reply With Quote
Old 11-05-2011, 04:25 PM #5
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: Looking for CR2 unprotected batteries..

I'm sorry to harp on about this, but can someone help me understand where we get 3V (nominal) lithium ion cells from, if they're not just regular 3.6/3.7V (nominal) cells with a voltage dropping diode on a PCB integrated into the cell?

I was under the impression that we have:
- 3.6/3.7V (nominal) Typical Lithium Ions
- 3.0V (nominal) Typical Lithium Ions (with a diode onboard dropping voltage)
- 3.2V (nominal) LifePo4s

So, what are the little 3V green CR2s we all use in our GLP pointers? I had assumed they were lithium ions with a diode inside to drop the voltage. Are they something else?

Is there actually a 3V lithium ion rechargeable?
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)


Last edited by rhd; 11-05-2011 at 04:25 PM.
rhd is offline   Reply With Quote
Old 11-06-2011, 01:35 AM #6
Nocturnal's Avatar
Class 1M Laser
 
Join Date: Apr 2011
Location: Brisbane, Queensland, Australia, Earth.
Posts: 159
Rep Power: 12
Nocturnal is a glorious beacon of lightNocturnal is a glorious beacon of lightNocturnal is a glorious beacon of lightNocturnal is a glorious beacon of lightNocturnal is a glorious beacon of lightNocturnal is a glorious beacon of light
Nocturnal Nocturnal is offline
Class 1M Laser
Nocturnal's Avatar
 
Join Date: Apr 2011
Location: Brisbane, Queensland, Australia, Earth.
Posts: 159
Rep Power: 12
Nocturnal is a glorious beacon of lightNocturnal is a glorious beacon of lightNocturnal is a glorious beacon of lightNocturnal is a glorious beacon of lightNocturnal is a glorious beacon of lightNocturnal is a glorious beacon of light
Default Re: Looking for CR2 unprotected batteries..

i think the 3.7v ones are lithium-ion and the 3v ones are just lithium.??
__________________
532nm-100mW Focusable Host
660nm-100mW Flashlight host

DIY 5mW-200mW Focusable Green Laser Pointer Tutorial

Upcoming: 445nm ~1.6W Saik,
All power ratings are estimates,Will insert powers when I finish my LPM
Aussie Laser Laws
Nocturnal is offline   Reply With Quote
Old 11-06-2011, 01:57 AM #7
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: Looking for CR2 unprotected batteries..

Quote:
Originally Posted by Nocturnal View Post
i think the 3.7v ones are lithium-ion and the 3v ones are just lithium.??
Lithium cells are primary cells - not rechargeable.
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)

rhd is offline   Reply With Quote
Old 11-06-2011, 03:36 PM #8
benmwv's Avatar
Class 3R Laser
 
Join Date: Sep 2010
Location: wv
Posts: 1,389
Rep Power: 152
benmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond repute
benmwv benmwv is offline
Class 3R Laser
benmwv's Avatar
 
Join Date: Sep 2010
Location: wv
Posts: 1,389
Rep Power: 152
benmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond repute
Default Re: Looking for CR2 unprotected batteries..

Quote:
Originally Posted by rhd View Post
I'm sorry to harp on about this, but can someone help me understand where we get 3V (nominal) lithium ion cells from, if they're not just regular 3.6/3.7V (nominal) cells with a voltage dropping diode on a PCB integrated into the cell?

I was under the impression that we have:
- 3.6/3.7V (nominal) Typical Lithium Ions
- 3.0V (nominal) Typical Lithium Ions (with a diode onboard dropping voltage)
- 3.2V (nominal) LifePo4s

So, what are the little 3V green CR2s we all use in our GLP pointers? I had assumed they were lithium ions with a diode inside to drop the voltage. Are they something else?

Is there actually a 3V lithium ion rechargeable?
I don't think it could be a diode dropping the voltage because that would cause problems charging right?

I'm not sure what they really are, but I think they have some type of circuitry responsible for it because 3v ones are usually longer. (so Ive heard)
benmwv is offline   Reply With Quote
Old 11-06-2011, 03:54 PM #9
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: Looking for CR2 unprotected batteries..

Quote:
Originally Posted by benmwv View Post
I don't think it could be a diode dropping the voltage because that would cause problems charging right?

I'm not sure what they really are, but I think they have some type of circuitry responsible for it because 3v ones are usually longer. (so Ive heard)
You might be right. There's something inside though. If you look up li ion chemistries on wikipedia, none are 3.0 V.
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)

rhd is offline   Reply With Quote
Old 11-06-2011, 05:25 PM #10
piferal's Avatar
Class 3R Laser
 
Join Date: Apr 2011
Location: Andorra
Posts: 1,280
Rep Power: 184
piferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond repute
piferal piferal is offline
Class 3R Laser
piferal's Avatar
 
Join Date: Apr 2011
Location: Andorra
Posts: 1,280
Rep Power: 184
piferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond repute
Default Re: Looking for CR2 unprotected batteries..

Some secondary CR123 Li-ion battery (or 16340) and CR2 have a circuit to bring the 3.7v down to 3.0v, to make compatible with devices
that use primary Lithium Manganese Dioxide cells, so you can use a rechargable cell in a device which is expecting run only with a primary 3.0v battery.

However, this tends to sacrifice a substantial portion of its capacity, also note that normally they need to use a different charger from normal li-ion cells.
piferal is offline   Reply With Quote
Old 11-06-2011, 05:56 PM #11
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: Looking for CR2 unprotected batteries..

Here's what a lot of us are familiar with:
Rechargeable 3V CR2 800mAh Green (Pair) - Free Shipping - DealExtreme

Looks to me like a cell with a PCB on it.

I suppose my remaining question is - should they be charged with:

1) A regular li-ion charger (meant for 3.6/3.7V nominal cells)
2) A LifePo4 charger (meant for 3.2V nominal cells)
3) Some other charger ?
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)

rhd is offline   Reply With Quote
Old 11-06-2011, 07:11 PM #12
piferal's Avatar
Class 3R Laser
 
Join Date: Apr 2011
Location: Andorra
Posts: 1,280
Rep Power: 184
piferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond repute
piferal piferal is offline
Class 3R Laser
piferal's Avatar
 
Join Date: Apr 2011
Location: Andorra
Posts: 1,280
Rep Power: 184
piferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond reputepiferal has a reputation beyond repute
Default Re: Looking for CR2 unprotected batteries..

^^ This was already answered before, you need a specific charger,
and yes, as mentioned above, also contain a Circuit Board to regulate the voltaje.

Also this type of batteries "normally" uses a protection circuit against overcharge/overdischarge/overcurrent,
(maybe not all the cited before) and many chargers do not like this.

For charge a secondary 3V CR123 battery this as an example (Is not very good, but it is for instance).

UltraFire 3.0V/3.6V CR123A Charger - Free Shipping - DealExtreme

I've never tried to recharge these batteries with a LiFePo4 charger, but the LifePo4 charger
uses also a constant-current, and constant-voltage like the li-ion battery chargers,
what is most different between the 2 types of batteries is the charge current, which for LiFePo4
batteries is higher, and the voltage which also differs somewhat, 3.2 ~ 3.3v.

If the charge current can be adjusted to the needs of the your secondary 3v li-ion battery,
"maybe you can use it", but for security I would rather have a dedicated charger to recharge each battery type.
piferal 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 08:44 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