Battery draw problem?

[DaveImagery]

Hi XDA friends,

When I backup my blu-rays, I create mkv files so I can watch them on my Nexus. Since I'm low on storage from games etc, I use a usb 3.0 thumb drive and a otg cable. Playback is fine, but battery life seems to tank dramatically. I can't even finish a 2 hour movie before the tablet dies from 100% charge. If I make room on the tablet itself, and play the movie from it directly, battery drain is much less. So watching via thumb drive and otg cable drains a lot more power? I'm mystified.

Thanks

 

[ethanchow]

What otg cable are you using? A cheaply made one could have joints that short out connections causing battery drain.

 

[k23m]

So watching via thumb drive and otg cable drains a lot more power?

Yes, using one of these I measured for you current from SanDisk Extreme 128GB thumb drive:
standby 70mA
write 120mA
read 100mA

N7 needs around 500mA to play videos, so extra 100mA from OTG is substantial.

 

[DaveImagery]

I picked up this one from my Local Micro Center.

http://i.imgur.com/XXD5yJf.jpg