Good battery but with inaccurate remaining time display

On the Internet places to read in forums that FZ1000 just comes down to +/- 300 images on a single charge. Therefore, 2 spare batteries. However, I did not want to spend almost 50 again.
The original Panasonic but I come to approximately 700 pictures per charge, therefore was the 2nd Battery really unnecessary. (I photographed about 95% without flash and added a few minutes of film in FullHD.)

The positives: The Patona battery I come to about the same number of photos, despite actually 200mA less capacity. Unfortunately, the battery has one major drawback: The remaining time display comes very late by 3 bar to 2 down and already very shortly after the indicator flashes, because the battery is empty.

Since the battery is only 1/3 of the original part costs, it is to use as an emergency battery definitely. As it is reflected in the long-term test, will have to be seen.

I did with my old Panasonic FZ28 very different experiences, what the shelf life of third-party batteries may concern: 2 Cheap NoName-parts were floored "Factory" scrap and after 10 frames. The battery of Conrad worked well at first, but very quickly lost its capacity and has migrated to 1 or 1 1/2 years in the garbage. Connect3000 was 1a and has served to last for years as a 2nd battery for my old camera without having deteriorated appreciably.

If I have a comparison, as the Patona be reflected in the FZ1000, I'll adjust the review accordingly.

Update 3/26/2015:
So far the battery is still going as described above, even though I am now of the opinion that the term does not quite come up to the original. I can not say yet, he already wears top against the new condition, or whether I only noticed only by the now quite frequent use as the beginning though.
Should he keep this level, he continues to be a useful for the competitive price spare battery.