Do you have a multimeter? Since the light does not come on with the tail switch you can just put your test leads on the tail cap area and measure the current from battery to tube.
The LED alone is probably 0.15 to 0.20 milliamps. This is very tiny and would take a year or more to drain. As for the driver, I can’t say.
Some are way less than the LED current and some may be 1.5 milliamp.
The main thing is just to not leave the tail switch on for months at a time and you should be fine.
I have an S70S coming today, so I could measure it maybe this evening.
With a precise DMM that goes to 1000's of a volt and doing a 24 hr test, that may help to tell you. Might be a specific issue with your light. Got a USPS notice the S70S was delivered home, but picking up a new car later (lease), then heading home.
That is a big drop. No way it should drop that much in 24 hours. That’s like fully charged 4.2 volts to mostly drained 3.5 volts in a week. No way they would design it with that much drain.
If the LED switch light has a 135 µA (0.135 milliamp) drain and you use 5,000 mah batteries it should take 4 years to fully drain them.
I have a TA FET driver in my L6 using an LDO and it only has a 0.08 milliamp drain. So combine that with the switch light and your still at 4 years to fully drain the batteries.
Now I assume Thorfire built their driver with parasitic drain in mind so as not to have a bunch of unhappy customers. I assume.
We shall have to wait and see someone’s S70-S drain numbers.
I just measured the parasitic drain of the S70S just received today, and it's 4.37 mA on two EFEST 4200 IMR's @4.10V.
That's pretty darn high. Even if the LED took 500 uA, the draw should be 600 uA or so at worse. With this high of a draw, something is wrong with my driver or the driver was not designed with low parasitic drain in mind.
I’m running 2 leds and I set them up to be bright and that’s only 0.4 milliamp. Thorfire’s single led is probably under 0.2 milliamp so the driver itself is about 4.0 milliamps.
The Q8 driver has a 0.02 mA draw with switch led turned off and a 0.135 mA draw with it turned on. That’s very good.
I guess Thorfire expect their customers to always turn it off with the tail switch?
Are you talking about a bleeder resistor for the switch led? I’m sure it does just to not burn it up. Still, 2 bright leds only pull 0.4 mA. So the single, not so bright, led in the S70-S can’t be more than 0.2 or 0.3 mA. The big 4.0 mA draw has to come from the driver.
Or do you mean a bleeder resistor that is part of the driver circuit? I’m not familiar enough with driver dedigns to comment on that.
It’s not that big a deal if you turn the tail switch off when your done using it or you recharge the batteries every week or 2 already.
Oh yeah, the new model is the S70-S. The older one is just the S70.
I know the new driver is slightly small in diameter and the sense resistors are a larger smd size. The firmware is definitely different. I don’t remember too much else about the 2 drivers.
Yeah, that would turn the S70-S into a beast. With only 0.08 mA drain from the driver as well. Maybe 0.2 mA total for driver and single LED side switch.
The $37 light, plus $25 driver, turns it into a $62 light. That’s the price of an L6, but Narsil and the increased output make it worth it. It’s still a bargain.
Don't think you can use the indicator LED though, not with 3 channels, an e-switch, and voltage divider resistors for 2S -- that's all 5 I/O pins used.
Unless someone can help with the firmware coding, I won't have time for looking into pin sharing for quite some time. I'm struggling for time as it is.