Biden simply needs to remind the country of how dangerous it used to be when Trump was sending out 2am tweets, and how we used to have kids in cages with Trump and how Trump said you could use HCQ to fight Covid and warn everyone that if Trump gets into power he'll weaponize the DOJ to go after his enemies. Tell us again how Trump is colluding with the Russians and that the Hunter Biden laptop is Russian disinformation. Then he should point out all that he has done for the economy, for national security, and for justice. Also don't run from your age, you can't even walk fast from it, no, address it head on. Sure you are older, but the people who are pulling the strings and really running the country are still very much alive and kicking.
Hopefully Biden can say all that in 30 seconds before his battery runs out.