ksrcrider

i have a 97 ford ranger iv had it about a year now when i first got it it had a bad battier in it so i got a new one. I heard a click noise which sounded like it was coming from the front driver side fender it clicked a few times then started up then it happened a few months later same thing few clicks started today i started it up and it seemed like the battier was losing power but started up i stopped some where and when started the truck up it almost didnt turn over then i stopped some where to get something to eat came out and all i got was clicks. turned the key over to see the battier metter showed it had power radio working fine head lights didnt seem dim so i tried to jump it and just clicks soo i had to push start it. could it be battier or bad ground the starter has rust on it or could the starter just be old and worn out Note i have a 5 speed manual