One of the problem with the 24 volt Dewalt batteries are that they are only 2 A/H. You would need 4 of those to get much ride time. I have been tempted to try Milwaukee 28 v Lithium ion batteries. That only because I have the set.
The number 24V700C220W28KM 24v is the voltage. 700C is the rim size. 220W is the motor wattage or power. I don't know about the 28KM.
It is typical for a 24 volt motor to use 36 volt batteries. My BionX ebike uses a 36 volt motor with a 48 volt battery.
Your original batteries had a 9.0 A/H capacity that translates to ridetime. Your replacement battery should be close to that or more. More is always better.
I just done this update to an EV Global ebike that was produced in the 80s I built a Lithium ion pack that was 36 volt and 15 A/H. It was 10 pounds lighter than the original battery.
The Kobalt 40 volt batteries are nice but you would need about 4 or 5 of those to equal your original battery.