Maybe since it’s ‘Duracell’ (and they are know for their batteries), maybe it’s a conspiracy for you to buy more batteries. Not sure what (circuitry) might be causing it – but something must be… If yes, then there must be a ‘parastic drain’ going on with that flashlight – slowly discharging it over time. – Soak and swab a Q-tip over the terminals. To clean up the corrosion ‘fluff’ caused by leaking ALKALINE batteries: How To Clean Battery Corrosion Alkaline Batteries: You should remove the batteries from the battery compartment to prevent a potential slow discharge and the resulting leak and corrosion. Or maybe you haven’t used it for months and months. You might have a portable radio set aside for emergencies. Dead or low batteries are more likely to leak. This will prevent a slow discharge of the batteries and therefore prevent leakage when the batteries get low or go dead. They’re guaranteed not to leak.Īnd/Or, Remove the batteries from electronic devices that will not be used for a significant period of time. Purchase Energizer MAX brand batteries (shown above). (amzn) How To Prevent Battery Corrosion In Electronics How-to prevent battery corrosion in flashlights This will slowly drain the batteries while you may not even realize it. Many modern devices have active circuitry which is always ‘on’ to some extent. A ‘find me’ dimly lit LED is another example. When the device is turned off, the clock continues to draw down the battery, albeit very little. Examples of batteries that corrode in devices.Ī clock display screen on a portable radio is one good example of parasitic drain. As a result, the batteries may eventually leak.Ī device that is left unattended for long periods of time (with the batteries installed) may drain down slowly and kill the batteries. It will slowly discharge the batteries until they’re ‘dead’. Consequently this leads to a dead battery (or batteries) which will out-gas and corrode.Ī slow parasitic battery drain is common in many devices. They will discharge even quicker when small trickle currents slowly drain the battery (‘parasitic drain’). These batteries will gradually and naturally self-discharge. Here’s why… Self Discharged & Parasitic Drain With that said, batteries that are left installed in devices are more likely to leak. Why Do Batteries Corrode If Left Installed?Ĭonsumer alkaline batteries (such as the common AA or AAA) can eventually leak and corrode while on the shelf. High temperatures can also cause batteries to rupture and leak (hot, summer environment). And dead batteries may eventually leak, resulting in the “white fluff” corrosion. This will occur whether they are setting on the shelf (a much slower process) or installed in a device (which often occurs much quicker). Dead Batteries may Leak (AA | AAA)Īll batteries will slowly gradually self-discharge over time. Again, the Energizer Max battery claims no-leak (perhaps better seals than other brands). This out-gassing process increases pressure in the battery.Įventually, the excess pressure may rupture the insulating seals at the end of the battery, or the outer metal canister, or both. Why Do Batteries Leak? Hydrogen Gas Out-Gassing | Poor Battery SealsĪs batteries discharge, the chemistry changes and some hydrogen gas is generated. Why? Apparently the positive end is vented better. It typically leaks on the negative end of the battery cell. This will leak out, forming a white “fluff” of potassium carbonate. It’s the alkali equivalent of acid’s hydrochloric acid. The “alkaline” of the battery is potassium hydroxide. It’s most often seen at the Negative ( – ) end of the battery. Potassium Carbonate is the white fluffy corrosion that develops at the ends of the battery. Here’s a closeup picture of the ‘white fluff’ and leakage. These batteries seem to eventually corrode. I made the switch and can attest that none of them have leaked:Īs of this writing, the best price I’ve seen for these batteries:Įnergizer MAX AAA What is the White Fluff Corrosion on the Battery? UPDATE, Energizer guarantees that these particular batteries will NOT corrode. (See below for Car Batteries / corrosion) Energizer Batteries Guarantee No Corrode, No Leak Here’s a photo of the battery compartment to one of my gadgets – clearly showing battery corrosion. I’m talking about typical consumer batteries such as AA or AAA size. – Batteries that will NOT leak or corrode. It creates a mess and may even ruin the electronic device. Typical AA battery corrosion from leaking. As a result, it migrates into the battery terminals. No doubt that most of you have seen the ‘white fluff’ of battery corrosion. How many of you have seen a corroded battery compartment in one of your consumer devices? Have you wondered why do batteries leak, and ways how to prevent it?
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