I was skeptical - but Panasonic had also warned party batteries since they are going to be installing a chip in the cameras so that no third-party batteries can be taken. Immediately upon receipt I have charged this third-party batteries and tried on my Panasonic Lumix 150 - function properly - the display works. How long do the batteries and whether the discharge is then displayed, I can not say - but I'll try in the next commit time pending. But even if they do not keep as long as the originals - the price difference is huge - you can save 45 per battery anyway, because you can then also --................ take 2 party batteries on holiday and is then always on the safe side.