You (and many others) seem to just misunderstand the concept. Swappable storage battery is not intended to be swappable by hand because its weight is 150 kg.
Maybe the proper fix is to add swappable car battery which could be the first thing one is imagining when heard “swappable battery”.
Just add
{
"id": "battery_car_removable",
"copy-from": "battery_car",
"type": "vehicle_part",
"name": "swappable car battery",
"item": "battery_car",
"location": "on_battery_mount",
"requirements": { "install": { "time": 1000 } },
"flags": [ "NEEDS_BATTERY_MOUNT" ]
}
to the \data\json\vehicleparts\battery.json, and add this newly added battery where appropriate.
Or, even easier, just replace "copy-from": "storage_battery" with "copy-from": "battery_car", and all swappable storage batteries will become swappable car batteries weighting 18 kg which one could easily swap by hand.