Why Might Smartphone Explode In Charging?

July 10, 2014 Tech

kinkoo-battery-deathSmartphone is the daily must-have gadget for the vast majority. Admittedly, we’d like to think that smartphone explosions are only isolated cases but when you start to pay attention, they aren’t so rare that you can’t find more than a handful of extreme and bizarre gadget accidents.

The most common reason for a smartphone to explode is using it while the phone is being charged. To understand this, you have to be concerned with lithium-ion batteries. Every battery has positive and negative plates, with a separator in between. In today’s batteries, made for smaller and smaller gadgets, that separator is often very thin. If anything metallic gets in between the separator, it can cause a short circuit. If that happens, things can get very hot very quickly.

Lithium-ion batteries are particularly vulnerable to this problem, because metallic lithium tends to form in between the plates when the battery is overcharged — that is, if it keeps charging beyond 100%.

However, all electronics have safeties to prevent overcharging, so it’s a highly unlikely culprit. But in fact, not all the smartphones have a good job in the quality control. If something crept in that’s metallic, a short could occur between the two plates. It may be so small that it’s unnoticeable, but eventually a little bit of warmth, heat or vibration could make it worse. It’s almost like leakage in a water dam. It works itself open and then the dam breaks.

So, to be safe, we always recommend our readers to buy branded smartphones and high-quality accessories, and this is why Kinkoo uses lithium-polymer battery in its best backup battery charger for iPhone, Samsung and so on. Because lithium-polymer battery is a newer battery type that theoretically delivers longer battery cycle life and higher safety factor than lithium-ion battery, and the difference between them has been published in our Facebook notes: Difference Between Li-ion battery and Li- polymer Battery.

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