Long host for p60 dropin

Inspired by my other thread:

Does anyone remember the deal with a solarforce extension tube, mentioned here:

I can’t find the topic.

The reason I’m searching for it is because I’m buying this p60 dropin, and want to do some research into what options there are for a host with possibilities for some decent battery time in it:
http://www.customlites.com/P60-Led-Engin-365nm-UV-P60-CR-UV.htm

It’s a gift for my ol’ mum, who also sometimes goes amberhunting. But she has not got the amber fewer as bad as I do :stuck_out_tongue:

Total n00b here.

These two combined:
http://www.customlites.com/Solarforce-Black-L2M-Flashlight-Body-Sol-L2M-BL.htm

http://www.customlites.com/Solarforce-L2-E18-1X18650-extension-tube-Sol-E18-Exttube.htm

With the dropin in the first post.

How do I calculate what type of batteries is required?

With a single tube you can use 1 x 18650 or possibly 2 x 18350. With the extension tube you will need 2x 18650. Another alternative is using 2 primary CR123 with a single tube. Doubling up protected cells may be too long but I’m by no means certain of that.
Edit- no calculation is needed, it says in the link from the first post 4.2-8.4V which is one or two liion cells in series.

Sorry, I wasn’t clear.

How do I calculate that two 18650’s isn’t to much for the driver/drop-in?

I’m reading to figure it out.

But again, total n00b here :slight_smile:

1x Li-ion = 4.2v

I’m reading these:

http://lygte-info.dk/review/batteries2012/Common18650Summary%20UK.html
http://lygte-info.dk/review/batteries2012/Common18650IndividualTest%20UK.html
http://lygte-info.dk/review/batteries2012/Common18650comparator.php

Just to be sure:

The amount of mAh dictates how long the battery runs?

If i put two 18650’s of 3,7V in serial = 7,4V right?

And when using 18650’s in serial they should be protected, right?

And finally, how do i calculate an estimated battery-time for lets say these 18650’s at 2900mAh ?

I’ve got specs for driver, the LED, and the batteries , but how do I make the calculations?



How is that 4.2 and not 3.7?



Sorry about all the questions :oups:

Not sure if you have seen this?

With your run-times, basically, 2*18650 is going to give almost twice the run-time of 1*18650, assuming the same current to the emitter.

Of course, the efficiency of the buck driver will play a part here.

With your voltage question, 3.7v is the nominal voltage. Fully charged, they are 4.2v (some cells are 4.35v). So you could potentially have up-to 8.7v with two fully charged cells in series.

Thanks for the info :slight_smile:

Yes I’ve seen it. But went for the l2 body plus extender setup. The one you’re linking to is only body. No endswitch I think.

Oh, and I’m buying from http://www.customlites.com because he has the Ledengin Lz1 365nm uvLed.

Crap!
I just realized that customlites.com dont have the package with both l2 body and extender. I had to add both body and extender separately to the chart.
5.99$ plus 15.99$

At solarforceflashlight-sales.com i only have to place one package in the chart to get body plus extender at 15.99$

Hmmm. I’ll send customlites a mail :slight_smile:

So far really pleased with customlites.com

Ordered
P60 drop-in / Led Engin 365nm UV

Solarforce L2N host

Solarforce L2-E18 1X18650 extension tube

Dave from customlites wasn’t able to match the prices from http://www.solarforceflashlight-sales.com -but that’s mainly because of the “no shipping fee” at http://www.solarforceflashlight-sales.com

Only a small difference in price.

Furthermore according to Dave, customlites are offering the 2014 models, whereas solarforceflashlight-sales.com are selling 2009 and 2011 models (at least for the models I bought)

Looking forward to see if I can get a sunburn from the Ledengin z1 8)