1. A typical tablet battery recharger provides 10 Watts of power. 60% of this power is converted to chemical potential energy of the battery while the rest is lost as heat. When filled, the rechargeable battery can hold 45,000 Joules of chemical energy. How long does it take to completely charge the drained battery?

1. A typical tablet battery recharger provides 10 Watts of power. 60% of this power is converted to chemical potential energy of the battery while the rest is lost as heat. When filled, the rechargeable battery can hold 45,000 Joules of chemical energy. How long does it take to completely charge the drained battery?