Replacing Clock battery with non-rechargable Coin battery

I have a Dreamcast VA1 with the standard Chargeable Coin Cell with tabs and I was thinking replace it with a socket but disable the charging circuit with a diode so I can use Engerizer’s Lithium Coin-Cells.

I’m not sure which diode is best for the Clock battery mod - most used a Zener Diode for their mod.