Replacing clock battery, just want to make sure I understand this right..

[Pat the Cat]

Never done myself on A2000.

You might find this thread helps;-

https://forum.amiga.org/index.php?topic=50279.0

Most people fit the diode on the battery holder, which means only one pin soldered direct to the board. (Which is why you see pictures of battery holders with one end raised up).

A more demanding approach is to mod the tracks on the motherboard,

Are you sure you don't want to fit a lithium rechargeable coin cell?

[Pat the Cat]

Affirmative.

This is why people have advised you to use a lithium rechargable rather than standard non-rechargable coin cell.

Because with a non-rechargable type, you need to fit a diode.

Fitting it in the right place is a different story. You want it to connect the +5 of the coin cell to the +V supply on the clock chip - AND NOWHERE ELSE.

Otherwise the systerm tries to draw current from the coin cell with no main power, which rapidly exhausts the battery.

A clue - if you fit it (diode) the wrong way around, the clock chip won't remember the time.

[Pat the Cat]

Am currently a little tipsy for reading schematics and giving a more informed opinion.

EDIT: Page 9 of

https://www.amigawiki.org/dnl/schematics/A2000_R6.pdf

R803 looks correct on a rev 6 A2000. Take out R803 Put the diode there, stripe away from the battery towards pin 18 of the clock chip.

That should work. Dunno how different rev 4 is, probably not much.

Do check connectivity with the clock chip, you might have damaged traces in the area. Hopefully none, or fixable if some.