The battery in a small tablet computer starts out uncharged. It is linked to a constant $10\,\text{W}$ power supply for $2.0$ hours in order to charge the battery. The charging process has an efficiency of $80\%$. What amount of energy is stored in the battery?
- A$1.6 \times 10^1\,\text{J}$
- B$1.6 \times 10^3\,\text{J}$
- C$5.8 \times 10^4\,\text{J}$
- D$5.8 \times 10^6\,\text{J}$