Tracer 97 Alternator Chenge

[anhorvat2]

I have to change the alternator. Never did it before.
In the box, on instruction: “Charge battery to at least 12.6V or Alternator Death will occur.”
I checked the battery; I have 7.5V or 7.8 with the engine on. I checked the battery on my other car, year 2004, still have just 7.5V.
Can I change the alternator with 7.5V battery or I have to buy a new one.
On the Repair Manual for my car is nothing about voltage when you change alternator.
Please help a rookie in cars.
Thanks a lot.

[walterramjet]

A bad battery will destroy a perfectly good alternator. yes, of course you need to replace the battery and the alternator.

Originally Posted by anhorvat2

I have to change the alternator. Never did it before.
In the box, on instruction: “Charge battery to at least 12.6V or Alternator Death will occur.”
I checked the battery; I have 7.5V or 7.8 with the engine on. I checked the battery on my other car, year 2004, still have just 7.5V.
Can I change the alternator with 7.5V battery or I have to buy a new one.
On the Repair Manual for my car is nothing about voltage when you change alternator.
Please help a rookie in cars.
Thanks a lot.