It certainly catches the eye when a chief executive of a prerevenue start-up to berate the market for failing to support its vision when it has just collected £15m ($22m).

But then Oxis Energy, a UK-based rechargable battery maker for electric bikes and cars, does have a strong position in battery storage systems.

As Huw Hampson-Jones, chief executive at Oxis Energy (formerly known as IntelliKraft) since January 2010, said: “Over the past two years, it has become apparent to…