Silent Knight 5104B help

Now I know about chargers! Now, correct me if I’m wrong… Trickle chargers might damage and shorten its life, however… That hasn’t been proven yet, (unless there’s a story behind it, maybe a video… I don’t know, something…) so therefore, like, and yet, unlike radio (transceiver) batteries… It most likely doesn’t harm the battery, it just keeps the battery fully charged… I’m not being mean or anything, I’m just throwing in my $.02 to believe of something which I could be wrong about… So, please… Correct me if I’m wrong about ANYTHING, thank you.