I have some of the twist on ones and the clip ons, and liek I said, I dont see much differance in them. I havent had any of the twist ones stick on, and I havnt had any probs with the clip ones.. Ok I take that back, the twist ones wont work on Odonell plugs, but thats about the only draw back in my opinion.. I guess if I just had one, it might be a issue, but I have like 6 of them, so I just grab whichever ones there.. And actually the one I got from tower, I think I've only charged once, and I've had it for a long time... But again I have a bunch of them so.. yeah... all the same to me..