I found it now on the web: here (lyrics for 'jacket of batteries')

Wolfgang

MANDELA
(Words and music Phil and June Colclough)

Beside the creeks the lion speaks,
And the rain falls iron rain.
The rivers flood to spread the blood,
They do enlarge the stain.
Like bullets raindrops travel,
To hit the taking drum,
Across the land a voice is heard,
Mandela is the one.
Mandela, Mandela, Mandela,
Mandela, Mandela,
Mandela is the one.

Along the shores the lion roars,
And the wind blows blazing wind.
The grass is stirred to spread the work,
She makes the tall trees sing.
Like tempests storm winds gather,
Flaming spears they come.
Across the land a voice is heard,
Steve Biko is the one.
Steve Biko, Steve Biko, Steve Biko,
Steve Biko, Steve Biko,
Steve Biko is the one.

Beneath the sun the lions run,
No cage shall hold their rage.
As they draw near the word is clear,
And printed on the page.
The night is filled with voices,
Whispered like the sun.
Across the land a voice is heard,
Sisulu is the one.
Sisulu, Sisulu, Sisulu,
Sisulu, Sisulu,
Sisulu, is the one.

Beside the creeks the lion speaks,
And the rain falls iron rain.
The rivers flood to spread the blood,
They do enlarge the stain.
Like bullets raindrops travel,
To hit the taking drum,
Across the land a voice is heard,
Mandela is the one.
Mandela, Mandela, Mandela,
Mandela, Mandela,
Steve Biko, Sisulu,
Mandela is the one.