Arc LS w/AA-fatty bored for 17500, anyone ?

Made to fit Regular AA or 14500 (3.6v)
14500 translates to 14mm OD and 50mm high.
An 14500 can supply "only" 750 mAH,
which is the very same as a R123....
An increased battery-tube will therefor not increase runtime....

I measured the smalles OD of the tube, which is at the knurls and where the O-ring sits. This is 19.17mm.

An 17500 (protected from AW) has 1100mAH.
17500 translates to 17mm OD and 50mm high,
meaning it's 3mm wider then a regular AA sized cell.

The ID of the tube is 15.80mm at the moment.
I might be able to open this to accomodate the wider
17500 cell. Therefore I would bore it to an ID od 17.17mm,
which will still leave at least 1mm at the smalles OD at the knurls
and O-ring...

I'm wondering if anyone has done this before, and what the results are.
I'll be doing this mod very soon, as soon as I can fond someone to do it
for me :naughty: ...

The next step would be to check it a 3mm longer 17500 or 17600 (1600mAH) could fit... The "bottom" of the tube is 7mm thick, so boring it down will mean it would leave only 4mm. I have still to make sure this will not create a hole
where the eyelet is :lolsign: ...

I will post more info regarding this mod in this thread later...

Cheerio !!

--reserved--

EDIT1: An 17670 would NOT fit, since boring it down and wider would create a hole at the eyelet... .

hey bombelman,

Why don't you just go for it and do a run of custom 18500 tubes? Looks like the CR2 ones were a success! Keep the AA Fatty as the collectible it is...

yeah! what he said ^

and, um, 18650 would add only 15mm (0.59" for the metric-impaired)

oumphh.... 18560 in an Arc LS Tube ? Not easy.... The "slot" where the O-ring sits has an OD of ONLY 19.17mm... So that would leave a tube of only 0.585mm... Same issue at the threads...

The AA-fatty IS a lengendary tube... But I can't ever really use it, since a 14500 won't give me more "umphh" then a RCR123... If you know what I mean...

I'm still deciding:
option (A): 17500, will requre a wider ID...
IF I would ever use a regular AA in there, it would have HUGE battery-rattle, so I would have to wrap the battery with some paper or something....
=or=
option (b): 14670, which will require a longer tube,
so it would be bored down...
I would have no battery-rattle, but I would need te be using a spacer....

Both of these cells provide 1100mAH.....
Which would YOU choose (to do)...

Cheers !!

bombelman said:

oumphh.... 18560 in an Arc LS Tube ? Not easy.... The "slot" where the O-ring sits has an OD of ONLY 19.17mm... So that would leave a tube of only 0.585mm... Same issue at the threads...

Click to expand...

I think a 18500 would be better, but thats me. The tail uses a pretty fat o-ring. You might be able to make the OD a bit bigger and use a thinner o-ring. This is of course if you are having it machined

bombelman said:

I'm still deciding:
option (A): 17500, will requre a wider ID...
IF I would ever use a regular AA in there, it would have HUGE battery-rattle, so I would have to wrap the battery with some paper or something....
=or=
option (b): 14670, which will require a longer tube,
so it would be bored down...
I would have no battery-rattle, but I would need te be using a spacer....

Both of these cells provide 1100mAH.....
Which would YOU choose (to do)...

Cheers !!

Click to expand...

17500 has an advantage of being able to use 2 RCR2s (or 2 primaries - i think duracell cr2s are 925mah) to get higher voltage :naughty: for a short amount of time. I think battery rattle with a 14500 is not a problem. You already said there is no use for a 14500, since you could just use an RCR123 instead, and have a much shorter light.

I think you should not bore your AA fatty, and have these made. Keep it short by not bothering with an eyelet, but leave enough meat on the base to mill a shallow tritium slot on the bottom.

Its fun to be an 'armchair machinist'.

ouchmyfinger said:

I think a 18500 would be better, but thats me. The tail uses a pretty fat o-ring. You might be able to make the OD a bit bigger and use a thinner o-ring. This is of course if you are having it machined

Click to expand...

The threads would be thinner also...

ouchmyfinger said:

Its fun to be an 'armchair machinist'.

Click to expand...

My Paypal is george(at)bombelman(dot)com