If you give another car a jump start with battery cables could you damage your own battery and alternator. I did this for a friend about two years ago and this past week I had to get a new battery and alternator. The original battery and alternator were approx. 5 years old.
2 Years ago? I’m sure you could damage your own charging system but I seriously doubt it would take 2 years to show.
" I did this for a friend about two years ago and this past week I had to get a new battery and alternator. The original battery and alternator were approx. 5 years old."
Sorry but it would seem unlikely that it would have taken two years to show up even if there was damage.
That said, I suggest that you tell us that make a model car you have. Some are more sensitive to things like that than others. You should find out now so you will know, next time someone needs some help.I find this question to be very odd. Its like asking whether the flat tire you got yesterday was caused by the road debris you ran over 2 years ago.
Alternators & batteries are wear & tear items. They occasionally have to be replaced.
I think maybe you should tell the whole story. Who is mad at whom? And what should the discussion really be about?