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A77ii battery discharge

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SteveMRose View Drop Down
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Post Options Post Options   Quote SteveMRose Quote  Post ReplyReply Direct Link To This Post Topic: A77ii battery discharge
    Posted: 16 October 2017 at 03:25
I am really confused. My A77ii is discharging batteries even when i have the camera turned off. Why is that? What is going on?

I have the vertical battery grip on and a Tamron 16-300 (Tamron 16-300) and I just cannot figure out what is eating the batteries.

Any help is greatly appreciated.
Best
Steve Rose
Steve Rose
a99-VCG/a77ii-VGC|Son 24-70 ZA f2.8|Son 18-135 f3.5-5.6|Min 35 f2|Min 50 f1.4|Min 80-200 2.8 APO HS G|Min 100 f2.8 MACRO|Son 70-400G f4.5-5.6|Sig 400 APO MACRO|HVL-F58 & F60
 



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stiuskr View Drop Down
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Post Options Post Options   Quote stiuskr Quote  Post ReplyReply Direct Link To This Post Posted: 16 October 2017 at 04:49
First step would be to remove the grip to rule that piece out.
Rob Suits Jr.
a99M2 a99 a77 a700 KM7D|Min24/2.8 Min35/2 So50/1.4 So50/2.8 Min85/1.4G Tam90/2.8 Tam180/3.5|Tam17-50 KM28-75D So70-200G1 So70-300G So70-400G1|MFC-1000w/1200AF Metz54MZ-4i SonyF60
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Post Options Post Options   Quote br1 Quote  Post ReplyReply Direct Link To This Post Posted: 16 October 2017 at 08:26
Many battery grip have issues, as battery drain.

Only the original Sony work well.

The Tamron lenses have battery drain issues on Canon EF Mount, not with Sony A.

Remove the battery grip and check the situation after 24 hours with: camera off and one full charged battery.
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amrep View Drop Down
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Post Options Post Options   Quote amrep Quote  Post ReplyReply Direct Link To This Post Posted: 16 October 2017 at 09:02
Originally posted by SteveMRose SteveMRose wrote:

My A77ii is discharging batteries even when i have the camera turned off.
I don't know any modern digital camera that has a real off switch. The "OFF" position is in fact a suspend or sleep mode. Some battery drain is perfectly normal. However, many Sony cameras for some reason are among those who quite rapidly discharges batteries when "off". Even a fully charged and healthy battery will be discharged in a few months.
Popping out the main battery is possible, but it's not a good measure because it prevents the automatic charging of the internal battery that powers the clock, probably reducing the lifespan of the internal battery.
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Post Options Post Options   Quote Miranda F Quote  Post ReplyReply Direct Link To This Post Posted: 16 October 2017 at 10:15
I've seen electrical faults on a chip which can drain the battery if one of the chip's input or output driver transistors has a failed device in it (failed s/c), which allows both transistors to be on at the same time. In extremis this can cause a chip to overheat and fail completely but more commonly it causes a current drain and an indeterminate state on that one input/output (which may or may not cause obvious problems).

However a poorly designed chip (poor sleep mode) in the battery grip may also cause battery drain, and batteries themselves can give problems. Can you swap batteries and the grip and isoalte the problem?
A900, A58, 5d, Dynax 4, 5, 60, 500si/600si/700si/800si, various Sony & Minolta lenses, several Tamrons, lots of MF primes and *far* too many old film cameras . . .
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Post Options Post Options   Quote neilt3 Quote  Post ReplyReply Direct Link To This Post Posted: 16 October 2017 at 11:29
Not shure it should make a difference when the camera is switched off , but try putting the camera in Airplane mode to disable WiFi .

Just a thought.
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Basil View Drop Down
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Post Options Post Options   Quote Basil Quote  Post ReplyReply Direct Link To This Post Posted: 16 October 2017 at 14:09
Is the battery grip turned off? Leaving it on will drain the batteries, even if the camera itself is turned off.
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Post Options Post Options   Quote minolta_mutley Quote  Post ReplyReply Direct Link To This Post Posted: 16 October 2017 at 14:42
I'm having such a problem on my nex-c3. I can live with it, because it goes slow (14 days to empty a battery - chinese clone). My c3 has no grip on it - nothing attached to it.
If anyone has a clue on how to debug this kind of troubles i'd like to hear.
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Post Options Post Options   Quote stiuskr Quote  Post ReplyReply Direct Link To This Post Posted: 16 October 2017 at 17:47
Battery draw issues are something only techs with wiring diagrams and the proper tools can diagnose. If it was a car you could place a multimeter in series with the ground circuit and then start pulling fuses until the draw goes away and now you know where to start. With cameras you'd need some sort of break out box to plug ribbon connectors into to tap into the circuits.
Rob Suits Jr.
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Post Options Post Options   Quote SteveMRose Quote  Post ReplyReply Direct Link To This Post Posted: 17 October 2017 at 01:02
Ah ha- i always keep the grip on so I will try and turn it off.

Also, I disengaged the battery grip and put the battery that read 77% in the grip into the camera and it then read 97%. It was still at 97% 9 hours later.

I have another grip and have put that on and it is reading 97% on the battery that was in the camera and reading 97% while in the other grip it read 77%.

I'll post tomorrow morning to let all know how this goes.

Thanks for the suggestions and information.
Steve Rose
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Post Options Post Options   Quote SteveMRose Quote  Post ReplyReply Direct Link To This Post Posted: 19 October 2017 at 00:35
Ok- this is stranger than fiction.

I have two VGC battery grips for my a77 and a77ii. I put fully charged batteries into the two slots and left overnight in both grips, one at a time. In both cases the battery being used showed discharge- usually about 20%.

Here is where it gets weird- If I remove the vertical grip and insert the battery that shows 80% into the camera battery slot, it shows 99%. If I then put the battery back into the vertical grip, it now shows 99%. In other words, if I remove the battery from the vertical grip and put it in the camera, the reading of the charge is different, and then when put back into the grip, it now reads as if in the camera.

So, anyone have any idea what is going on?

Thanks for any ideas.
Steve Rose
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Post Options Post Options   Quote Photosopher Quote  Post ReplyReply Direct Link To This Post Posted: 19 October 2017 at 04:01
Similar issues described HERE. But with charger meters reading differently.

There is something goofy with a77 battery grip power management. It may have something to do with genuine Sony batts vs aftermarket. But at least we're not getting the old a900 dual battery grip incompatibility warning of "Info Lithium Battery Required" when two batteries are used. My a7RII dual battery grip started giving that warning with latest 4.0 FW update. It didn't before. And it sometimes happens with both genuine Sony batteries installed.

This also reminds me of a problem I have tethering a7RII with dual batteries. Sony Remote Capture software blocks use when battery 1 has 25% left, and never switches over to battery 2. Program stops until battery 1 is replaced. The extra power draw from tethering combined with the lower power EMount batteries makes it very frustrating. Thank goodness Capture One Tethering for Sony never displays this problem.

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SteveMRose View Drop Down
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Post Options Post Options   Quote SteveMRose Quote  Post ReplyReply Direct Link To This Post Posted: 20 October 2017 at 22:42
Ok- next part of the story. battery discharge stops at 73% no matter how long i leave it. And, when I remove the vertical grip, take the battery and put it in the camera, it shows 93%. I then put it back in the grip, and the grip back on the camera and the battery now reads 93%.

So, something funky with the grip power communication since it stops at 73% no matter if a Sony OEM or a secondary market battery- both act the same.

Now I know and when a battery reads 0%, I know to pull the battery, put it in the camera and see what charge actually still exists.

Most interesting to say the least.
Thanks for the discussion.
Steve
Steve Rose
a99-VCG/a77ii-VGC|Son 24-70 ZA f2.8|Son 18-135 f3.5-5.6|Min 35 f2|Min 50 f1.4|Min 80-200 2.8 APO HS G|Min 100 f2.8 MACRO|Son 70-400G f4.5-5.6|Sig 400 APO MACRO|HVL-F58 & F60
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stiuskr View Drop Down
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Post Options Post Options   Quote stiuskr Quote  Post ReplyReply Direct Link To This Post Posted: 20 October 2017 at 23:11
Originally posted by SteveMRose SteveMRose wrote:

...when I remove the vertical grip, take the battery and put it in the camera, it shows 93%. I then put it back in the grip, and the grip back on the camera and the battery now reads 93%...


You're doing it in the wrong order. Never attach the battery grip to the camera with the batteries loaded in the grip, always attach the grip empty and then load the battery tray or it will cause weird electrical gremlins like you're having now. I'm not saying this will fix your issue, but it's well documented to cause problems and there is a warning in the user manual to remove the tray before installing the grip.

Edited by stiuskr - 20 October 2017 at 23:14
Rob Suits Jr.
a99M2 a99 a77 a700 KM7D|Min24/2.8 Min35/2 So50/1.4 So50/2.8 Min85/1.4G Tam90/2.8 Tam180/3.5|Tam17-50 KM28-75D So70-200G1 So70-300G So70-400G1|MFC-1000w/1200AF Metz54MZ-4i SonyF60
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