A typical AA size rechargeable NiMH battery can store $1100-2100$mAh of electric charge. The small print on the battery in your hand says $1610$mAh. Can you express this amount of electric charge using the usual coulomb units?

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You are now charging a camera battery. The charger moves $5770C$ of electric charge from the negative terminal of the battery to the positive terminal. $($In reality the charger moves the negative electrons from the positive terminal to the negative terminal, but this is not important for us right now.$)$ Assuming $-$ incorrectly $-$ that the voltage of the battery remains a constant $3\mathrm{.}55V$ during the whole charging process, determine the work done by the charger.

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And now you are charging a capacitor bank for a high$-$voltage physics experiment. The power supply moves $Q=8470C$ of electric charge in the charging process. The supply is set to stop, when the voltage reaches $V=630V.$ How much work did the power supply perform?

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