Thanks for sharing this and sorry to hear your Mi7 OP.
*Not a good sign while waiting for mine to arrive. Really sucks if the parasitic drain on this flashlight is bad.
EDIT: Would love to know if anyone else have this same issue…
Oh man, I hate to hear this. Was just about to cave in and make an order, think I’ll wait a while and see if there is some more information on this.
I hope the op’s light is not common to all as hundreds of this light has been bought for months already and this is the first report of high parasitic drain.
Just received mine yesterday.
Hopefully it’s not a confirmed issues for all Mi7.
You’re very welcome. Thanks for your condolences. :zipper_mouth_face: Hopefully your’s will not have the same issue. With the number of Mi7’s already purchased, I’m sincerely hoping it’s an isolated incident. Over all, I really like the light. It’ll just be a bummer if I have to use physical lock-out to save my batteries.
I will start now a test, 2 batteries of my rotation for my 2xaa lights (same brand, lote and use). One inside one of my Mi7 (I have 3, I can do without it, for a while 
) and one in his box, in 15 days-1 month I will test the voltage.
(I do not use the electronic lock function, I prefer unscrew…I will try to test this in my next reviews)
One question for MKduffer, when you use the Mi7, you lock the light? seems yes. When you use T01 you lock…. ? I think is not possible…or perhpas you lock the T01 with mechanical lock (unscrew)?
Regards.
Maybe I’m missing something, but why won’t you just measure the standby drain current directly?
With my equipment, I can not give you a reliable measurement for this low currents.
But you’re right. Many people have this model. Can some owners give us their measurements…
I was pleasantly surprised to find out a lot of cheap basic DMM actually do have the ability to measure microA. More expensive DMM have like a 4000 or 6000 count ability. I personally think it’s worth getting a cheap DMM with this feature; it’s great being able to measure parasitic drain, especially after having experienced this phenomenon in an unpleasant way. Not to mention that if there is scatter, you will know for sure whether your specific light suffers too much from it.
Really is not a problem for me , I not use the electronic lock, I prefer unscrew a little the threads. (thanks for your interest:-)
Regards.
Hey Trevi_lux,
Thanks for doing the testing. Yes, I do use the electronic lock out on the Mi7. I haven’t needed to lock out the Manker as the button is recessed enough so that when it’s clipped into my pocket, it has never accidentally turned on.
BTW, I also have a Klarus AR-10 and Olight SR10 II. I use electronic lockout on both of them and have not had issues with parasitic drain. AR-10 had been in my backpack for several months and still has good battery life. The SR10 II’s been on e-lock for at least a month and still reading 4.04v in my charger (sorry, no DMM at work).
185 µA on my Mi7. So about 5 months to drain a 14500.
Thanks! Just wondering if it is plausible that you’re going to get a much different value when testing with NiMH. Obviously you will because the voltage is different, but perhaps the efficiency may be of a completely different order. With 14500 it’s 777 microW (=185 x 4.2), but is this the same with NiMH? Would you be so kind to test it with NiMH as well? Thanks!
168 µA on an Eneloop.
Thanks! This means 202 microW opposed to 777 microW. Practically a fourth, which is interesting.
Good info. Thanks.
Sounds like I have a lemon. Thanks maukka.
edit:
| Type | Capacity (mAH) | drain (mAH) | Days | Months (assuming 30 days per) |
| AA NiMH | 2500 | 0.168 | 620.04 | 20.67 |
| 14500 | 800 | 0.185 | 180.18 | 6.01 |
Although your conclusion that you have a lemon is unfortunately correct, you used wrong parameters. Capacity for NiMH should be 2000 or 2500 mAh; you used a value for AAA instead of AA.