Many years ago, the Samsung Galaxy Note 7 gained notoriety when its batteries caught fire in a series of incidents. Since then there has been a steady stream of similar, albeit isolated, incidents. However, despite the high-profile coverage of batteries gone wrong, the vast majority of lithium-ion batteries are safe. The chemical reaction that occurs
Many years ago, the Samsung Galaxy Note 7 gained notoriety when its batteries caught fire in a series of incidents. Since then there has been a steady stream of similar, albeit isolated, incidents. However, despite the high-profile coverage of batteries gone wrong, the vast majority of lithium-ion batteries are safe.
The chemical reaction that occurs inside a lithium-ion cell is complex, but like any battery, there is a negative and a positive electrode. In lithium batteries, the negative is a lithium-carbon compound and the positive is cobalt oxide (although many battery manufacturers are moving away from cobalt). These two compounds cause a safe reaction when controlled and supplying power to your devices. However, when the reaction gets out of control, you end up with the headphones melting in your ears. What changes a safe reaction to an uncontrolled reaction can be several things: excess heat, physical damage during use, physical damage during manufacturing, or using the wrong charger.
The three basic rules that have kept me safe when testing dozens and dozens of batteries are these:
- Avoid cheap cables, chargers and power adapters;
- Make sure batteries are not exposed to excessive heat (over 110 degrees Fahrenheit);
- Periodically inspect batteries for signs of damage.
The most important rule is to avoid cheap adapters, cables and wall chargers. These are the most likely source of problems. Those chargers you see on Amazon for $20 cheaper than the competition? It’s not worth it. They probably lowered the price by skimping on insulation, leaving out power management tools, and ignoring electrical safety basics. Price alone is also no guarantee of safety. Buy from reputable companies and brands.
Then there is the heat. Too much of it can cause all kinds of problems, both in terms of downloading and security. Avoid heat and pay attention to the batteries when they are charging. If your device becomes too hot while charging, this may be a sign of problems. Likewise, be careful with swollen, bulging, or deformed batteries.
Check back often for more exciting news!
