Over the last five years, I have seen around 18,000 Ultralife batteries churned through transmitters on reality location shoots.   Sitting in a 'jungle' for 21 weeks, and on islands for a further 23, gives you plenty of time to observe battery life.

"That's one small step for man... one giant leap for mankind."

When Armstrong uttered his immortal words, few would have appreciated that Tranquility Base’s radio power was a mere four watts or, in our jargon, 4,000 milliwatts (mW).