Ticking Powerpack

[jerry]

Of late, heard my external Bosch 500w Powerpack making a ticking noise....was fully charged. An irregular ticking, but nevertheless, could be heard quite clearly. Dry, normal temperatures (not heat-related), seemed to operate as usual. Ticking seemed to disappear when Pack was below 50% power left...
Anyone else heard anything like that?

 

[steve_sordy]

Don't try taking it though an airport, or a ferry terminal!!! A ticking power pack will have you up against a wall with your legs apart!