How much damage has been done is usually a function of how long the leaking batteries have been in the device. The Global Parts Bin To The Rescue Fresh and new battery clips for AA holders A feature of alkaline cell leakage is a white crust, this is potassium carbonate formed from the reaction between the potassium hydroxide electrolyte and carbon dioxide in the air. The electrolyte will then corrode the battery terminals and any other electronics it touches. It incorporates a vent which allows the hydrogen to escape, however the hydrogen pressure can instead force the electrolyte out through this vent. Meanwhile an alkaline cell has a build-up of hydrogen as it degrades. It’s hardly a concentrated acid, but it’s enough to do plenty of damage over the years. The leaking electrolyte then attacks the surrounding circuitry and battery clips. The failure mode of a zinc-carbon cell is a chemical one, the acidic electrolyte reacts with the zinc can anode, and eventually eats through it. They both have different failure modes that result in the leaky cells, so it’s worth taking a look at each one. The zinc-carbon variety are becoming less common here in 2022 and have an acidic zinc chloride or ammonium chloride electrolyte, while the alkaline cells have a higher capacity and a basic potassium hydroxide electrolyte. Non-rechargeable cells come in a variety of chemistries, but the commercial ones we’re most familiar with are zinc-carbon “dry cells”, and “Alkaline” zinc-manganese dioxide cells. This has left me curious, just what has happened here and how can I fix it? What’s The Leaky Stuff? Construction of a zinc-manganese “alkaline” cell.
#DO DURACELL BATTERIES LEAK FULL#
The problem is that very few owners of 8mm cameras had the good sense to remove their batteries before putting them away, so I inevitably end up with a battery compartment full of crusty 1980s Duracells and rusted contacts.
They were a valuable item back in the day so of course they were hung on to, then they were forgotten about until one day the grown-ups who were once the kids featured in the home movies are clearing the house, and they start their journey to my bench. The trouble with scouring junk shops for a technology superseded four decades ago is that the cameras I find have in most cases been sitting in a drawer since the early 1980s. When A Cell Is From West Germany, You Know It’s Old “Made in West Germany”
#DO DURACELL BATTERIES LEAK MOVIE#
After all, what’s not to like in a dirt cheap piece of consumer electronics from decades past that’s just begging for a bit of hardware hacking? For me at the moment this is manifesting itself in a selection of 8mm movie cameras, as I pursue a project that will eventually deliver a decent quality digital film cartridge. Seasoned Hackaday readers may have noticed over the years, that some of us who toil under the sign of the Jolly Wrencher have a penchant for older tech.
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