They really need to stop using these Li-ion polymer batteries! They may have the highest capacities (*citation needed), but heck, they are really unsafe, even though it is rare for them to explode (causes could possibly be):
- High temperature (a higher temperature than indicated on the battery, which makes portable notebooks with a battery installed more likely to explode)
- Improper usage
- charging with a *much* higher voltage than indicated (some fake/counterfeit chargers may output voltages too high if they malfunction)
- 'improper' charging
- overcharging
- water/liquid damage (sometimes)
- The battery is defective/the board on the battery is defective
The list could be longer, but I couldn't think of more variables for this..
otherwords, these batteries are unsafe
sources: my brain