fire-stick
Enlightened
I guess I could use the energizer 2500's I have but I don't know if they can handle the BID D bulb? Would I be better off getting some CBP 1650's?
Would the CBP 1650's be necessary for the ROP 2D mag mod?
- Thread starter fire-stick
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SilverFox
Flashaholic
Hello Fire-Stick,
Both cells will work. The light will be brighter with the CBP 1650 cells but run time will be less than if you use the Energizer 2500 cells.
Tom
Both cells will work. The light will be brighter with the CBP 1650 cells but run time will be less than if you use the Energizer 2500 cells.
Tom
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DreamScape
Enlightened
Hi Fire-Stick,
I will second what Tom Says.
Colin.
I will second what Tom Says.
Colin.
Warhoggie
Enlightened
Love the Energizer 2500s. Used 16 AAs to make a 19.2 volts on a flashlight. I don't know the voltage sag there though. The bulb was 12v 20watt rated at 2000hours.
Dan_GSR
Enlightened
SilverFox said:
how much of a difference are we talking?
how much brighter? how much longer?
modamag
Flashlight Enthusiast
It's not really so bad with Energizer 2500. ROP only pulls 2.0A so it's not even 1C yet. At that rate CBP1650 have ~0.4-0.5V advantage over Energizer 2500 or Titanium 2600.
As a guestimate with 0.03V difference you'll see 9% intensity increase (3% brighter) with CBP1650.
Rerated Candlepower = [Va/Vd]^3.5 x Candlepower at Design Voltage
Runtime will increase by 34% with Ti2600 (2.592Wh) vs CBP1650(1.928Wh).
If you want to be exact, then you'll need a sphere and do actual runtime test.
As a guestimate with 0.03V difference you'll see 9% intensity increase (3% brighter) with CBP1650.
Rerated Candlepower = [Va/Vd]^3.5 x Candlepower at Design Voltage
Runtime will increase by 34% with Ti2600 (2.592Wh) vs CBP1650(1.928Wh).
If you want to be exact, then you'll need a sphere and do actual runtime test.
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SilverFox
Flashaholic
Hello Dan,
In addition to what Modamag said, you should keep an eye on the Sanyo Eneloop cells. Early testing is showing that they keep the voltage up as well as, or maybe a bit better, than the CBP 1650's, and last longer... AND they have a normal nipple at the + end for charging.
Tom
In addition to what Modamag said, you should keep an eye on the Sanyo Eneloop cells. Early testing is showing that they keep the voltage up as well as, or maybe a bit better, than the CBP 1650's, and last longer... AND they have a normal nipple at the + end for charging.
Tom
lexina
Enlightened
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modamag said:
Last edited:
Tom, just did a search on the word Eneloop and came up with nothing so I posted a thread one them. Oh well, old news. can we buy these now? Have you tested any yet?
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modamag
Flashlight Enthusiast
lexina: I must be getting rusty cause I have no idea what a HOLA is. If you could provide the spec/voltage/cells/current I can do a theoretical guestimation.
SilverFox: Where can we get some of these Eneloop? If not now do you know estimated release date? I would love to burn down the barn.... um hum "test" these babies.
SilverFox: Where can we get some of these Eneloop? If not now do you know estimated release date? I would love to burn down the barn.... um hum "test" these babies.
lexina
Enlightened
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modamag said:
Sorry, I know the terms HOLA (high output lamp assembly) and LOLA are more commonly used to describe the high and low output lamp assemblies of Surefire products (for eg P60 vs P61). The ROP lamps also come in a set of 2 - the high output lamp is rated at 6V, 4A, 24W and the low output lamp is rated at 6V, 1.8A, 10.8W.
45/70
Flashlight Enthusiast
Also, wouldn't both of these lamps draw even more current at 7.2 volts? :thinking:lexina said:
Dave
modamag
Flashlight Enthusiast
Ah, that's what HOLA means. Well I guess I jump in too earlier with the ROP deal cause I have a LOLA (kinda like the lolita). Thanx for pointing that out lexina, maybe I'll get the HOLA set and see if I can appreciate the ROP a little bit more.
45/70, they don't really draw that much more current. On my Mastech 30V/30A power supply it's only sucking 1.9A - 2.0A. It was under constant voltage regulation and wide open for current draw.
Here's the estimate for the HOLA with 6xAA NiMh.
CBP1650 with 4A draw @ 0.5Ah is ~1.21V
Energizer 2500 with 4A draw @ 0.5Ah is ~1.14V
CBP1650 would be ~ 23% more intense (7% brighter) than Energizer 2500
Intensity Delta = [1.21/1.14]^3.5
Runtime will increase by 31% with Energizer 2500 (2.329Wh) vs CBP1650(1.779Wh).
* Note linear interpolation of power rating
45/70, they don't really draw that much more current. On my Mastech 30V/30A power supply it's only sucking 1.9A - 2.0A. It was under constant voltage regulation and wide open for current draw.
Here's the estimate for the HOLA with 6xAA NiMh.
CBP1650 with 4A draw @ 0.5Ah is ~1.21V
Energizer 2500 with 4A draw @ 0.5Ah is ~1.14V
CBP1650 would be ~ 23% more intense (7% brighter) than Energizer 2500
Intensity Delta = [1.21/1.14]^3.5
Runtime will increase by 31% with Energizer 2500 (2.329Wh) vs CBP1650(1.779Wh).
* Note linear interpolation of power rating
45/70
Flashlight Enthusiast
Thanks for the info modamag. Thanks to the others in this thread as well, and, to fire-stick for asking the question! 
Dave
Dave
PlayboyJoeShmoe
Flashaholic
Would y'all believe I only need a set of ROP bulbs to be in business?
Would you believe I won't be able to get any for the forseeable future?
It HOOVERS to so
all the time! :mecry: 
:sigh:
Would you believe I won't be able to get any for the forseeable future?
It HOOVERS to so
all the time! :mecry: :sigh:
adirondackdestroyer
Flashlight Enthusiast
- Joined
- Oct 31, 2005
- Messages
- 2,018
I already have 6 Energizer 2500 MAH batteries, but I also have 6 of the CBP 1650 coming in the mail for a 2D ROP mod I plan on doing. I am finding out however that the CBP 1650 are more of a hassle that needed. Mostly because they don't have a nipple on the end of the positive end.
You guys are saying that I can use my Energizers in my ROP, and it will still be almost (more than 90% of) as powerful as using the CBP 1650.
I want to use the 1650's in my ROP, but do I need to get small magnets to put on the positive end of the battery during charging and during operation? I am going to be using 2 of Elektrolumens 3AA-to-D battery holders, and my charger is a normal Energizer one that was purchased at Sams Club.
If anyone can suggest a nice charger that would charge all 6 of the 1650 batteries at one time, that would be great!
You guys are saying that I can use my Energizers in my ROP, and it will still be almost (more than 90% of) as powerful as using the CBP 1650.
I want to use the 1650's in my ROP, but do I need to get small magnets to put on the positive end of the battery during charging and during operation? I am going to be using 2 of Elektrolumens 3AA-to-D battery holders, and my charger is a normal Energizer one that was purchased at Sams Club.
If anyone can suggest a nice charger that would charge all 6 of the 1650 batteries at one time, that would be great!
lexina
Enlightened
- Joined
- Jul 3, 2005
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- 782
adirondackdestroyer said:
Check the Group Buys - there's a feeler going on now for some pack chargers that will do the trick.
lexina
Enlightened
- Joined
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cmacclel said:
Is that considered good or bad? Given that the high output lamp is rated at 4 amps, is the missing 0.2 amp the cause of the 7% difference in brightness estimated by modamag above?
Also, is the 7% difference (between the Sanyo/Energizer/Duracell/Kodak 2500s and the CBP1650s) constant throughout the run-time of the cells or does it get progressively worse as the cells discharge? Thanks.
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