Yes and no sir. Trust a number of testers (which includes myself) who have shown what are the best brands when it comes to lithium based cells. There are quite a few who lie about the mah, the c rating, etc. That's only one part though. There is a lot of counterfeiting that goes on with lithium batteries. Some vendors (even sadder is a higher percentage than I care say does this knowingly) sell batteries that are actually pulled laptop cells with a fake shrink wrap from one of these reputable battery companies. So it's not only important to know what are the best batteries, but where to get them.