Originally Posted by B-9
I would splurge on the Leica branded battery, the cheap batteries may be the cause of our problem. I never owned a genuine Leica battery for my m8. Best of luck!
My batteries are genuine Leica, from a dealer, and they do the dying at 1/2 bars randomly. There are routines posted to reset the "gauge", they don't in my experience work.
It's never a good idea to have the sun in an M8 shot, were you using filters?
I have had vertical streaks from strong point light sources but not horizontal lines. It is usually explained as light hitting the calibration pixels outside the image forming area. It is also stated you can provoke streaking by taking the M8 out of sleep mode and firing the shutter too soon, ie asleep, press and hold to take a shot, the electronics get out of step. It can also be a writing error to the card, take your pick