i have a 99 mazda 626 lx 4 cyl. i just put a new baterry in . it ran fine for 1 week / now it wont start . i did the pop the clutch push start and it ran fine . now when i turn off the engine it wont start and makes a clicking sound . i replaced the starter 1 year ago . can this problem be electrical ? or has anyone have any suggestions .

Have alternator checked.

I had the same problem once. I had replaced starter and as soon as car would warm up, it wouldnt start. turns out , i had replaced starter with a rebuilt one(lifetime guarantee however), it had been bench tested after being rebuilt while cold naturally, so It seemed to work fine in the shop. some starters after time become 'heat sensitive', so they work fine when cold. after i replaced my starter with a new one it worked just fine.