1998 Infiniti I30 Q&A

1998 Infiniti I30 Question: key turns on but wont crank

my battery was dead i jump started made it to work ,after work dead again put a new battery in worked fine for 5 days now key turns all ind. lights come on but car wont crank all lights head lights are brite .but it wont crank even with a jump start -
Answer 1
Have starter checked -
Answer 2
have charging system ck and also ck starter -
Answer 3
first make sure u have 12v on battery by itself , , then clean cables terminals very well ,, connect back and inspect alternator , it has to generate at least 14v .... -