Not blimps, they use helium. Blimps are basically a large balloon of helium with a passenger compartment hung below them, while dirigibles (i.e. Hindenburg) were metal framed, fabric covered airships with internal hydrogen tanks.
-Cliff Clavin at your service, sir.
It's a little known fact there Normy, that the Hindenburg actually used Delco batteries to supply their electrical needs when they shut down their internal generators during docking procedures.
