Not something you want on a flight. How can I prevent swollen batteries? This is especially important for laptop batteries that are used at home or in the office.
Use the correct power charger. Sometimes the original power charger gets lost or damaged and a new one is sought. Going for a cheap option might seem like good economy, but it may not have the same power output and could damage your battery or device, making it a poor choice. Replace the battery if it is damaged or no longer performing as it should. All batteries eventually fail so if the signs are there, take action and replace the battery. Store the device in a cool, dry environment. The CT scan below shows severe jellyroll distortion from gassing due to deep discharge.
As you can imagine, a battery such as this one would not work very well. A deep discharge condition can also create safety hazards. When a lithium-ion cell goes into deep discharge, it is in a highly de-intercalated state The word intercalate means to insert between layers in a crystal lattice. When the battery is deep discharged, the protective passivation layer on the anode called the Solid Electrolyte Interphase SEI layer decomposes, with new electrode and electrolyte surfaces coming in contact and new SEI layer is formed.
All of these reactions lead to gas formation. The copper current collector on the negative electrode also starts to dissolve as shown in Figure 2. Upon recharge these copper ions deposit on electrode or separator surfaces potentially leading to a copper short and the risk of thermal runaway Battery folks call this an event, while normal folks call this an explosion.
Puncturing a battery in any state is incredibly dangerous, but swollen batteries are especially vulnerable to compromise as their casing is already under stress from the built-up gases within. In short, handle any device with a suspected swollen battery with care. Next, if your device has a user-removable battery, you can try to carefully remove it.
If you encounter any unusual resistance to removing the battery, stop and follow the advice below for those with devices containing non-user-removable batteries. Do not discard the battery in the trash or elsewhere. Doing so can severely injure the health of sanitation workers who may come into contact with the battery, as well as the environment. Instead, always dispose of batteries — swollen or not — at an authorized battery disposal facility.
Many computer repair locations have the equipment and procedures to safely handle swollen batteries. Other electronics retailers, such as Best Buy , also offer recycling and disposal services.
Simply take the entire device to one of the locations mentioned above for assistance. Above all else, be safe. Your laptop or smartphone will likely continue to work with a swollen battery, at least for a little while. As you may remember from high school chemistry, if a chemical reaction does not fully consume all available reagents, it will create byproducts instead — and sometimes those byproducts are undesirable. As such, if you charge a faulty lithium-ion battery, the process generates gas rather than simply charging.
This gas builds up over time, and since batteries are hermetically sealed, they expand rather than vent. And if you keep charging and charging, the battery will eventually burst — and potentially explode. In fact, the odds are against it on a charge-by-charge basis. By way of disclaimer, I can only speak from my own experience as the owner of a Motorola phone with a Verizon Wireless plan.
But any manufacturer and wireless carrier should provide similar services to what's described below, so you should have most of the same options at your disposal. I tweeted at the Motorola support account , where a customer-service rep gave me some good advice.
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