Melted battery pack

[jadeblackhawk]

I just thought I'd post what happens when a AA battery explodes inside a metal detector:
I didn't take pictures of the sludge I cleaned out of the compartment, but needless to say it's going in for repairs, the plug where it connects the wires is damaged too Must have happened sometime sunday, as I used it Saturday, and tried to Monday morning. No idea why the battery exploded, I keep my detectors in the house when I'm not using them, so it didn't overheat in the truck or anything. I wish I had thought to take a picture of the battery before I threw it away, the whole bottom end was deformed outwards. I was using Duracell Quantum, going back to the coppertops

 

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[austin_luker]

probably a short that caused the battery to overheat and no protection from this inside the unit.

 

[jadeblackhawk]

yeah, I don't know. it wasn't in use when it happened. I didn't even know AA batteries could explode like that (when not being misused)

 

[vferrari]

Quantum super alkaline cells maybe not good for MD use, but most likely just a bad actor cell that went into an overload condition.. Yeah, I would go back to copper top if it suits your need since I have never heard of one òf them exploding. BTW what model detector were you using? Fisher forum but your profile only mentions a Garrett detector (Ace 250).

 

[jadeblackhawk]

Quantum super alkaline cells maybe not good for MD use, but most likely just a bad actor cell that went into an overload condition.. Yeah, I would go back to copper top if it suits your need since I have never heard of one òf them exploding. BTW what model detector were you using? Fisher forum but your profile only mentions a Garrett detector (Ace 250).

I've got several, just have never updated my profile lol This is my Fisher 1280x

 

[jeff of pa]

I've had problems with my sovereign battery packs
laying loose with metal items that got against the + & - conections.

And also had a 9 volt burn my leg because it was in my pocket with some change.
but never had a problem with batteries inside my detector thankfully.

I do worry about these lithium-based batteries that heat up & explode.

 

[fjs440]

Your battery may not have exploded. I also have a 1280-x and I fried a few battery packs before figuring it out.

When the battery pack in installed, it is possible for one of the bottom metal eyelets to touch one of the power input posts of the detector. Not a good thing.

Try this, line up the battery case and you will see where an eyelet lines up with the post. It will cause a short if there is too much soldier on the post or it's very tight fit forces it against the post. I use a thin plastic insert between the battery cartridge and the posts to stop the short circuit. This can happen even if the detector is not turned on.

I also place a strip of electrician tape across the bottom half of the battery pack. Between the tape and plastic insert, I have not had a problem since. It is a very tight fit.

Hopes this info helps explain what may have happened. Please let us know what you find out.