Run-Time Plot - HuntLight FT-01 3W

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Roy

Roy

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This runtime plot is for the HuntLight FT-01 using Lithium CR123A batteries.

Equipment used is a Extech Mdl 401021 Light Adapter into a Radio Shack 22-805 multimeter with a PC interface using Scopeview software (V 1.08).

The vertical axis is in mVDC and is equivalent to 1Fc@1Ft per 1mVDC. The horizontal axis isin units of time (15m/div).

Be aware that your actual battery milage may vary from that indicated by this runtime plot.


The runtime to 50% max brightness = 56 min using two CR123A Lithium batteries.

ft-01.jpg
 
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Has anyone noticed the light blinking just before the CR123A battery goes dead?
 
Hey Roy, thanks for posting the runtime review. Um, this is the XR-E FT-01 from Huntlight running on 2 cr123-sized batteries, right?
 
It is marked FT-01PJ 3W LED. If it is a XR-E how would I know...I didn't pay for a XR-E..I don't think!!! I only paid about $30 for the light.
 
Hi Roy,

I'm curious about the large difference between your result and the one posted here, where it ran 2.5 hours?

A 5W Nuwai light running on 2xCR123 lasts 1.8 hours, a 3W Fenix P1 on only one CR123 lasts about 1 hour. It seems that the FR-01 should run 2 hours at least.

Is the horizontal scale incorrect? Are you somehow able to make it run on 1 CR-123?
 
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wow... that runtime plot looks the same as chevro's, but the actual runtime is VERY DIFFERENT. i wonder why

-David
 
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As to why my plots are different that everyone elses, I really don't have a clue! I have run a second runtime plot using SureFire SF123A batteries and got 52 minutes (first tuntime plot was 56 minutes using Battery Station CR123A batteries). The difference could be amount of lightcoming out the lens...I measured 1,151 Fc@1Ft (Battery Station) and 1274 Fc@1Ft (Surefire) using fresh batteries.

The only way to run the light on one battery would be to insert a dummy battery to take up the empty space. I don't have a dummy 123A battery.
 
Hi Roy,

Have you made a current measurement at the tailcap? Perhaps you have a very hungry driver. We could compare current draw from the battery to make sure you don't have a "special" torch 🙂 I have a FT-01PJ as well.
 
I really don't have the skills or the equipment to do current measurments.

Before anyone asks...I don't do rechargeable batteries.
 
I used a digital voltmeter set to DC amperes on the 10A scale. I put the (-) lead on the bottom of the battery and the (+) lead on exposed aluminum on the tail. This creates a path for current, bypassing where the switch would be.

For non-rechargeable lithiums (two CR-123A) I measured 0.59 A (590 mA)

Considering CR123 batteries have about 1500 mA*h, I would estimate (1500/590) = 2.5 hours runtime.

If your runtime is less than an hour, you would have to be pulling 1.5 amps from the battery! That's 9 watts of power (1.5A*6V) to run a 3W emitter?
 
That sounds about right.

There are only two logical conclusions; (1) The batteries only have a fraction of the capacity they should have, or (2) The horizontal scale of the graph is off.

Did you witness only an hour's worth of runtime, or is your setup such that you start it and walk away, come back later and look at the data? This might rule out #2.
 
The software (ScopeView) is a set and forget operation. Take a close look at the printout and you will find everything needed to understand the plot...even includes the filename of the data file being plotted.

My light meter adapter is calibrated such that 1mV = 1 Fc@1Ft if you measure at one foot from the light.
 
OK, now I see the start and finish times are 4 hours apart, verifying the horizontal scale. It seems strange that two set of batteries behaved the same. I'm stumped!
 
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