ROP 2D Runtime?

What kind of runtime can I expect from a 6XAA ROP High? I will probably run Eneloops in it.

Eneloops ftw on a 6 pack for a 2d rop. I love mine. Mine gets too hot to leave on, but I know if I turn it off to cool down every 10 mins or so it runs a little over an hour on a charge. It's one of my favorite lights


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An ROP High on 6 x AA's will last ~ 20-30mins.... An ROP Low on the same set up will last ~ 1 hour

Thanks guys, thats longer than I thought it would be!

I have a ROP 2D, I run 6 X AA titaniums in it, currently running the High bulb. I thought that I had about 15-20min runtime on high tops. I dont think i get 30min with high bulb, the output drops rather rappedly. I probably get more than 15 min of high output, but i sure dont get that high output for very long...

Havent tried the low bulb yet. Have to take a hike in the woods and try it out better.

Someone dont happen to have a runtime chart?

Do you make your batteries rest for some time after charging before using them again? I just got my kit today! (2 FM 6AA to 2D adapters, FM MOP dual-purpose reflector and bulbs kit) I have a set of Eneloop and a set of Duracell Pre-Charged (believed to be rebadged Eneloop).

WildChild, with the 6AA set up, you don't need to let the cells rest.

eebowler said:

WildChild, with the 6AA set up, you don't need to let the cells rest.

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Thanks! I love this light!

FlashSpyJ said:

I have a ROP 2D, I run 6 X AA titaniums in it, currently running the High bulb. I thought that I had about 15-20min runtime on high tops. I dont think i get 30min with high bulb, the output drops rather rappedly. I probably get more than 15 min of high output, but i sure dont get that high output for very long...

Havent tried the low bulb yet. Have to take a hike in the woods and try it out better.

Someone dont happen to have a runtime chart?

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You're not using rechargeable batteries in your ROP?

i should try my eneloops to check for runtime cause my 2D ROP Low goes yellow in 10 to 15 minutes using energizer 2650 mAh NiMh rechargables...

VF1Jskull1 said:

i should try my eneloops to check for runtime cause my 2D ROP Low goes yellow in 10 to 15 minutes using energizer 2650 mAh NiMh rechargables...

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Maybe your batteries are bad or your adapter(s) has a too high resistance. FiveMega adapter?

I just tried my ROP HI with 2 3toD adapters (KaiDomain style) and 6AA Duracell 2650 mAh. The light went from bright and white (FM adapter) to dim and yellow! I didn't thought the difference would be that big!

divine said:

You're not using rechargeable batteries in your ROP?

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yes, I use Titanium NiMH AA.
After the second recharge of the batterys one of them leaked! I have heard that they tend to leak. But the reason I bought them was because they could deliver high current faster, so I could run the high bulb better. I personally dont have any experiences with HiMH batts more than a little with theese, so I wouldnt know which brand I would choose to replace theese with.

FlashSpyJ said:

yes, I use Titanium NiMH AA.
After the second recharge of the batterys one of them leaked! I have heard that they tend to leak. But the reason I bought them was because they could deliver high current faster, so I could run the high bulb better. I personally dont have any experiences with HiMH batts more than a little with theese, so I wouldnt know which brand I would choose to replace theese with.

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Eneloop and Duracell Pre-Charged seems to have the same performance in the ROP I made yesterday!

I have a question. What bulb life I can expect from ROP-HI and ROP-LO bulb on 6 AA NiMH?

Thanks

For my first ROP, I used a 8AA->2D from the sandwich shoppe. I played with alkalines and lithiums, but the bulbs went without 2 dummy cells. Then I tried Eneloops, first 6, then 7, then 8 full cells. No poofing, just brilliant solid output from the Low and High bulbs.

I havnt had it long enough to recommend it, but 25% more cells should equal 25% more run time. And 8 eneloops gave more output than 6 of anything else. Throw in a new lens and MOP reflector and you've got FL heaven.

ElectronGuru said:

I havnt had it long enough to recommend it, but 25% more cells should equal 25% more run time.

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Definitely not.

You're adding cells in series, which does not change the effective capacity of the cells. You're simply driving the bulb harder - i.e. using up as much energy as you're adding in.

If anything, an 8AA ROP would run shorter than a 6AA setup, because you're driving the bulb harder and therefore the current will be slightly higher (wattage will be significantly higher due to higher voltage).

I'm really surprised that 8 cells didn't turn the ROP bulbs into camera flash-bulbs, though...

Dont want to steal your thread, but how long runtime would 2 X 18650 batt provide?

FlashSpyJ said:

Dont want to steal your thread, but how long runtime would 2 X 18650 batt provide?

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My guess is approximately the same as 6AA NiMH (Eneloop). Maybe a little more.

FlashSpyJ said:

Dont want to steal your thread, but how long runtime would 2 X 18650 batt provide?

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Again, since we're talking about the same bulb, you can directly compare battery capacities.

So, if the 18650s are 2200 mah then it should be very similar to 2200 mah ni-mhs.

RoyJ said:

Definitely not.

I'm really surprised that 8 cells didn't turn the ROP bulbs into camera flash-bulbs, though...

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Thanks for the info. The particulars of series engineering don't seem to want to stick!

Yes, I'm VERY surprised that 8 Eneloops don't 8 cells pushing Low ROP, High ROP, no poof. But even 7 of anything else and no more bulb.