Parasitic Current Drain of TK50

[candle lamp]

Hi,

I've searched CPF but couldn't find parasitic drain of TK50.

If you know about it, tell me.

Also I'd appreciate if you let me know if the following values are correct.

- Parasitic drain of TK40 : 0.38~0.4mA
- Parasitic drain of TK41 : 0.13mA
- Parasitic drain of TK45 : 0.055mA

Thanks a lot.

 

[jirik_cz]

Don't know about TK50, but I measured 0.055mA for TK41 as well.

 

[Lanque]

On my TK50, i measured about 0.25mA when I first got it a few weeks ago - which seemed quite steep.
I will have to measure again when I get home to double-check.

 

[houtex]

Please don't ridicule me....
what's the danger/problem/disadvantage of the drain?? with primaries?? rechargeables?? lithium primaries??

 

[Lanque]

The problem with parasitic drain is that it eats away at your remaining battery capacity when your light is off.
Leave the light for too long, and you will find your cells discharged.

The TK50 can be locked-out at the tail-cap if I remember correctly, so this will stop the light draining your cells when you are not going to be using it for extended periods.

edit: I am not sure of the danger issues with parasitic drain, but presumably it would only cause a problem with lithiums, and only if the cells are unbalanced.
Alkalines would end up leaking, and being a danger to your light. And only if left too long. With fresh cells and the TK50, this would take a few years with D cells,
a year or two if using AA's in adaptors.

 

[candle lamp]

Please don't ridicule me....
what's the danger/problem/disadvantage of the drain?? with primaries?? rechargeables?? lithium primaries??

I didn't ask the stanby drain(parasitic drain) to ridicule anybody.
I have a TK50 and very pleased with it.
Just wonder the value of TK50 if it has standby drain.
You can find the parasitic drain somewhere in CPF in more detail.

 

[candle lamp]

On my TK50, i measured about 0.25mA when I first got it a few weeks ago - which seemed quite steep.
I will have to measure again when I get home to double-check.

Thanks a lot for your reply. If you do double-check, please let me know it.

 

[HotWire]

I have 2 TK50 lights and they both go flat in about a month's time. So... I charge them in my Maha charger about every 2-3 weeks if I don't use them. If I use them, I charge them. I have lots of lights, lots of batteries, but these 2 go flat the fastest. Some will last a year or more if not used.

 

[jirik_cz]

Sound more like a batteries with high self discharge...

 

[HotWire]

Both TK50 lights have Eneloops AA batteries.

 

[candle lamp]

Fenix has conformed that standby current drain of TK50 is 0.23mA is almost same as 0.25mA Lanque says.

The estimated runtime due to stanby drain only is about 2 years. It is under condition using [4 eneloop cells in 2 D-cell converters].

Thanks again for your interest. Gentlemen!

 

[2100]

Just measured 0.451mA for TK70. That's with 2 x Li-ion.

 

[candle lamp]

Just measured 0.451mA for TK70. That's with 2 x Li-ion.

Thanks for the measurement of TK70. 2100! :thumbsup:
I've got the value 0.23mA for TK50 from Fenix.

 

[Phil828]

This is a very unscientific observation of parasitic drain in a TK41. I bought the light last April and loaded it with Imedions right out of the package since I did not have a charger at the time. The light has not been used a lot (I tend to use my LD20 for every day) but the batteries have remained in the light until yesterday when I recharged them in my C9000. The average charge taken by the batteries was 600 mAh which would be one fourth of their capacity. I have no way of knowing how fully charged the new Imedions were but it appears that parasitic drain is not a great concern in this light.