For the money, the Kastar batteries are well worth it. One regular Tactacam battery is $50. You get 4 of these for $69.95. I've been using these for a couple of years now with very little trouble. The seem to hold up well, and last just as long in my opinion as the Tactacam batteries. The only complaint I have, I did get 1 battery that will not take a full charge, no matter how long I charge it. Therefore, it does not last as long once it's put into one of my cameras. Wasn't even sure about how to get ahold of the company for a replacement, so I just deal with it . Again, I would recommend these batteries just for the simple fact of the price, and overall with the good batteries I did receive, are well worth the money you will save !