By now we've all heard about "thermal incidents" with various type of lithium batteries and we've probably even seen videos of exploding laptops. Many of you have also complained about why it's taking so long for car-makers to get lithium batteries to market. One of the main causes of batteries getting too hot is overcharging or charging too fast.

Unfortunately determining the state of charge of a larger battery pack is not a trivial matter (we'll be following up with more information on this soon). A lot of the battery development work involves developing software to determine the state of charge and control the charging. For a look at what can happen when you over charge a lithium polymer battery, check out the video after the jump.

[Source: Kipkay, Metacafe]