Hello people, I have to buy a Ctek charger in front of me but there is a very nice selection of devices. Mainly I want to charge car batteries with it but if it is a little bigger it should not make it sluggish. To the selection stand: MXS 5. or MXS 7. or the MXS 10 What would be the best or with what do you have your experiences? What is it so nice to say: better buy right and then you have peace of mind! Thank you in advance! Greeting Tommy