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#Post#: 1449--------------------------------------------------
Re: XTAR H1 Commander Headlight (1x 14500 or 1x AA) Review
By: Spasmod Date: June 27, 2013, 8:09 am
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[quote author=blacklight link=topic=339.msg1434#msg1434
date=1372320180]
Very nice review with great photos and lots of detail. I was a
little surprised that using a 14500 actually results in an extra
low mode instead of of an extra high mode - and the other modes
are slightly reduced. If you want the highest output you need to
use alkaline/Nimh instead of Li-Ion. What does it cost?
[/quote]
Hi blacklight, Thanks very much.. if you swap everything around
it will be right. It's probably my tailcap amperage readings
that made it look that way.
There's an extra 'High' (turbo mode) with the 14500 Li-ion cell.
The other levels (low - med - high) are the same across both
cells.
The milliamp drive current readings are are lower with the
Li-ion cell due to it's higher voltage.
Hopefully that made sense :D
#Post#: 1450--------------------------------------------------
Re: XTAR H1 Commander Headlight (1x 14500 or 1x AA) Review
By: Spasmod Date: June 27, 2013, 8:18 am
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[quote author=MRsDNF link=topic=339.msg1436#msg1436
date=1372323071]
So how did the review go down at CPF. I dont visit that website
at all.
[/quote] It was very well received actually Steve, thanks for
asking. Actually I need to update this thread with the runtime
readings too!
I really do need a light meter with data outputting, then I'll
build an integrated sphere. It's necessary really for measure
runtimes with any degree of accuracy.
#Post#: 1452--------------------------------------------------
14500 Runtime Update
By: Spasmod Date: June 27, 2013, 8:34 am
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I've actually completed the runtime test which took a lot longer
than I expected. It's nothing fancy as I don't have the light
meter or graph plotting utilities but here's what I've found.
14500 Li-ion 750mAh XTAR cell. Starting voltage 4.19v
Start on Turbo mode
First step down to high at 5 mins exactly
The light seems to maintain what looks like a fairly constant
output until 1hr 51mins there is a slight flicker (maybe the
driver switches over to become a boost driver ? I'm not sure)
Brightness seems to now noticeably drop until the light switches
to Low mode at 2hrs 3mins
Cell voltage at switchover to Low mode is 3.16v
The light continued to run on low mode for a further 2 hours
before I stopped the test out of frustration
I then proceed to force the light to run on it's highest setting
until eventually it would step down to low as soon as I tried to
go to any higher level (just trying to get the cell voltage down
here)
Eventually after a further 3 or 4 hours on low mode (I lost
track at this stage), the light finally shut itself down - Shut
down cell voltage was 2.79v
Quick version
Turbo to High 5 mins
High to Low stepdown 2hrs 3mins (3.16v)
Final light shutdown (2.79v)
I hope that's helpful and I apologise for the lack of
runtime/lumen graph. I will carry out this test again using an
AA cell once I acquire one that isn't completely flat (my son's
Xbox controller *sigh*)
#Post#: 1458--------------------------------------------------
Re: XTAR H1 Commander Headlight (1x 14500 or 1x AA) Review
By: CarpentryHero Date: June 27, 2013, 9:30 am
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Looking forward to the Nimh or alkaline runtime.
I've got one of these on the way from Madecov at MDlightsource.
Should be here in a week or two :)
#Post#: 1474--------------------------------------------------
Re: XTAR H1 Commander Headlight (1x 14500 or 1x AA) Review
By: blacklight Date: June 27, 2013, 1:03 pm
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[quote author=Spasmod link=topic=339.msg1449#msg1449
date=1372338561]
Hi blacklight, Thanks very much.. if you swap everything around
it will be right. It's probably my tailcap amperage readings
that made it look that way.
There's an extra 'High' (turbo mode) with the 14500 Li-ion cell.
The other levels (low - med - high) are the same across both
cells.
The milliamp drive current readings are are lower with the
Li-ion cell due to it's higher voltage.
Hopefully that made sense :D
[/quote]
All is clear now. I misread the current graphs and mistook them
for output graphs. :-[ That's what I get for posting when I'm
tired.
#Post#: 1661--------------------------------------------------
Re: XTAR H1 Commander Headlight (1x 14500 or 1x AA) Review
By: Chloe Date: July 6, 2013, 6:59 pm
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This looks like a really nice headlight. Thanks for the review!
^^
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