I just had the exact same thing happen to last weekend. I had left the lights on and battery died. Got a boost and no problem. Drove over 200 kms and everything seemed fine. Next day go to the store to get my Mom's day gift and came out and clickity click....thatr's it. Tried to boost......same clicking.
Replaced the battery and have been good to go ever since. Thankfully cause I thought it was the Alternater but no issues since the new battery.