Here's the battery-bay, with which I'm well pleased. Note the packs are wired in series and the remaining terminals will connect to the battery-bus (power distribution board in drone-speak) and from thence to the four electronic speed controllers... and that's PDB and ESC for the three-letter acronym (TLA) fans amongst you. Under no circs join those remaining terminals together; as I have done twice, discharging all the available energy in a facial-hair-singeing-singularity.
In production transporters the battery bay will be lined with a firewall and there'll be an associated drill to execute in the event of BATTERY BAY OVERHEAT master caution. Though any fire is directed away from the crew, if it proves uncontrollable there's a FIRE, SEVERE DAMAGE OR SEPARATION drill (and should it fail you'll release the floor and bale).
Whatever they say, electrical aircraft crash and fail like every other. It's a forewarning that was associated with every new form of transport up to and including RMS Titanic.
