請問rechargeable battery 同 dry battery 兩者的pros and cons.

Some pros and cons of rechargeable battery and non-rechargeable battery as follows:

-The price of a rechargeable battery is more expensive than a non-rechargeable battery;
-We need a further cost of a battery charger to recharge the rechargeable battery;
-We can use the non-rechargeable battery at once when we have purchased one, but we can only use a rechargeable battery after we have recharged it;

However,

-We have to pay to buy one non-rechargeable battery every time when we need a battery, but we do not need to pay for another battery if we use a rechargeable battery; we only need to pay the monthly electricity cost and a replacement battery or the charger when either of them is worn out;
-For a long period of time (Assume the rechargeable battery and the charger can be used for a few years), the total cost of using rechargeable battery (that is: the rechargeable battery, the charger, and the total electricity cost for the period) should be cheaper than the total cost of consumption of non-rechargeable battery in the period.

(The cost comparison might differ depending on the brands of the rechargeable battery, the non-rechargeable battery, and the battery charger. We should assume the costs/life span of rechargeable battery, the non-rechargeable battery, the battery charger, and the electricity to be in average and normal).

I hope I can help you.

2007-10-10 16:19:16 補充：
O.K.嗎?

rechargeable battery 貴d; dry battery 平d;

rechargeable battery 耐用d; dry battery 冇咁耐用.