I've got a Motomaster Eliminator battery booster/power pack.
Kind of looks like this: http://www.canadiantire.ca/AST/brows....jsp?locale=en- except I can't recall how many Amps it is, and it's an older "analogue" version without any digital readouts, and uses an incandescent bulb instead of LEDs.
Anyway, I brought it with me on a trip out into the country; it was charged when I brought it, but slowly lost its charge, unused, and the level shows "Red" when I push the test button.
Today, it started making ticking/knocking/clicking noises, fairly loud. They sound almost mechanical and are coming from inside the battery's plastic casing. It emits a magnetic field whenever it makes these noises, so something electrical is happening in there.
I tried plugging it in to charge, but it still makes those noises. It's a bit alarming, so I've put it in a box and moved it far away.
Does anyone have any idea what could be causing this noise, and what I could do about it? Should I just "wait it out", try charging it, get it farther away, or...?
Really appreciate your help, thanks!