For the Li-F battery Dropships, you might go with just using them on giant Dropships, and accept that 25,000 tons of your cargo space is going to be taken up by the battery so it can handle any size FTL ship. You then have to factor in the the KF cost multiplier for a KF core for a 2.5 megaton Compact Core vessel now being applied with the Dropship cost multiplier. You might just throw your hands up and decide 5,000 tons is all you need, so it can fit any size Jumpship, and the smaller Warships (1/5 the mass/cost, plus 20,000 tons smaller). They can be recharged by a Recharge station, or by a Jumpship's solar sail if it is in-system longer than it needs to recharge its own KF core.
Advantage: The cargo can get to its destination much faster
Disadvantage: Expensive!
For the Energy Storage batteries normally mounted on Space Stations, you might go with making half-size batteries that are 50,000 tons each, and needing 2 Dropships to recharge a KF core in deep space. The Dropships are charged at a Recharge station, saving fuel costs. Mounting them on a Compact Core Warship takes up at least 4* the mass of a Li-F Battery, but does not have any KF cost multipliers.
Advantage: Much cheaper, and they can recharge the Jumpship simply by parking near the solar sail, or connecting a long extension cord to the ship's power grid. No need for actually docking the Dropship, meaning they don't take up a Docking Collar
Disadvantage: Need 2 of them per Jumpship, and it takes ~150 hours (the recharge rate for using a Recharge station). On a Warship it takes up far more room than a Li-F Battery, reducing tonnage available for armor, weapons, sensors, fuel, supplies, etc.