Fuel cells:<p>1. Run silently or near silently. They&#x27;re generating electricity via redox reactions, not combusting.<p>2. Have effectively no moving parts.  Again, no noise or vibration.<p>3. Product electricity directly.  For powering electronics, this means no secondary generation required.<p>4. Utilise extremely expensive catalysts.  The reason you don&#x27;t see fuel-cell automobiles (excluding very small numbers of test vehicles) is that the engines cost, literally, on the order of $1 million, as opposed to a few hundred for a typical ICE.  This price premium has proven difficult to overcome.<p>5. Operate better delivering fairly steady-state power, from what I understand.  A tremendous benefit of ICEs is that they can scale output in a second or few seconds, with very little throttle lag.  Yes, straight-up electric motors are even better at this, but straight-up batteries tend to not store much power.<p>A fuel cell is essentially a battery whose electrolytes you <i>fill</i> rather than <i>recharge</i> or <i>replace</i>.  This offers the advantages of fuel-based systems (high energy capacity) and batteries (direct electrical output).  Unfortunately, it introduces the disadvantages of fuel cells (cost, power delivery profile).