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Use attiny85 reset pin as analog pin

I want to use reset pin of attiny85 as analog pin to read the battery voltage to be used as low level battery indicator

So there is a lipo battery will be always connected to this pin

I need high voltage programmer to do so but

I read that pin reset can be simply analog pin of the voltage to it is above 2.5v Is it true?

If so, i can program it with arduino spi normally as the battery will never go below 2.5v