LR1/E90 "N"

Thinking of converting a sipik68 clone from a single Aa to 2x N cells, would the extra voltage (1.5 to 3v) make the light much brighter? Should only need to shorten/remove the tail spring to fit. Try to keep it alkaline as it will most likely be a gift for a non flashaholic friend. Let me know your thoughts…….

Anybody tried this or got any thoughts??? Also noticed NiMh N cells for sale might try with these too…….

Is there a reason you wouldn’t want to just use 3.7v lithium ion 14500 battery. You would get greater capacity and the light should be about 2x as bright

Yes Lightrider,it will probably end up as a gift for a non flashaholic friend. I have many lithium lights just thought I’d try something different. Would it not be 2x as bright with 2x alkalines up from 1?

My thoughts are regards the N type battery idea, they are not always easy to get hold of and are very expensive here in the UK , ( £3.99 each ) at argos, that’s a lot of AA batteries or a very good torch after a couple of N Cell battery changes

N cells are very expensive and weak…

Since the SK68 usually has rather wide inside tube, you could put 2x CR2 in series, but you’ll smoke the driver and / or the LED.
…unless you put an XHP50 in it and skip the driver. :smiley:

And you could also fit these inside:

Now, please bear in mind that, since SK68s use very simple boost drivers (to handle Ni-CDs/Ni-MHs/alkaleaks), not even with all my expertise do I find advisable to use unprotected li-ions on these crappy flashlights.

Thus, better install a protection PCB on these li-ion batteries meant to be used with SK68s and other multi-chemistry boost driver crappy torches.

Have a nice day. :-)

Cheers ^:)

The Led is already receiving 3v.
The driver is boosting the 1.5v up to 3v in order
to meet the forward voltage requirement of the led.

If the led was receiving 1.5v it would not light up at all.

The feat those boost drivers have to accomplish is quite a bit finickier. Because of the actual battery load voltages (IR dependant) plus other component induced voltage drops (springs, etc), their operative voltage range window needs to go waay lower.

A couple of self-explanatory captures borrowed from HKJ's battery comparator:

Left, red: Ni-MHs. Right, blue: alkaleaks.

Cheers fellows ^:)

I can get “N” cells for £2 at my local sainsburys that’s what got me thinking. Can any anyone confirm if 2x cr2’s fit this light? Next question do NiMh cr2’s exist? Are lithium manganese primary’s available in the Uk?Thanks everyone for you help trying to avoid lithium rechargeables with this one.

Tried the light with 2 NiMh and a piece of wire and it was twice as bright as with one cell, so now I’d like to know if 1/2aa or cr2 NiMh cells exist anyone know?

How long did you run it for, sometimes the magic smoke doesn’t come out straight away :wink:

Found these, so they are available

http://ogazent.com/cscart/n-cell-500mah-nimh-rechargeable-1.2v-battery-nt50nh/

https://www.amazon.com/1-2V-500MAH-NIMH-N-CELL/dp/B00G9BLR9C

As far as I have read these lights can run on 14500s so two NiMh should be fine? Also just found these will join to make a 2.4v aa to use in this light, thanks everyone for your input. I will report back with the results when I receive the batteries….

http://m.ebay.co.uk/itm/1-2AA-Battery-Ni-Mh-1-2V-600mAh-/361854445007?nav=SEARCH

If it works well could be a good substitute for those who don’t like like lithiums for 14500 lights.

Hey, nice find!

I see there are 1/3 AA NiMH cells too.

This seems like a fair deal:
http://www.ebay.com/itm/2pcs-1-3-AA-1-3AA-2A-3-6V-480mAh-Ni-MH-Rechargeable-Battery-with-Tab-Green-/151332050751?hash=item233c17d73f:g:3pcAAOxyUgtTMpxH

Nice find that could be good, might see if there’s a Uk supplier of those too.

Just ordered 2 of these won’t last long but I will use them in rotation should be ok and will be very bright. Thanks for the find Jerommel.

http://m.ebay.co.uk/itm/400688068178?\_trkparms=aid=222007&algo=SIC.MBE&ao=1&asc=20140131123730&meid=b1df9050e9af4b29bdde7a67d83ad6ef&pid=100167&rk=3&rkt=15&sd=380876838339&\_trksid=p5411.c100167.m2940&\_mwBanner=1