The power of a d size battery is usually 13A but it all depends upon the chemistry of battery but these batteries are usually made to support small physical devices.
Nom they are not the same at all.
a Duracell size D
a Duracell size D
Depends on whether the battery is rechargeable or not, and the battery chemistry, there are several different in the D-cell size.
In battery power it is 2.5 better that Toshiba. In size it is larger that Toshiba but not a lot.
Doesn't work like that. Current drain is dependent on the (internal resistance of the battery and the) resistance/power requirements of what's connected to the battery. If shorted out, the current - unless the battery is fused or otherwise protected - can go into tens of amps.
Usually a car battery, but it also depends on the size of the battery.
About 8000-19500 mAh at 1.5V
If you have the battery out of the unit then just match up the voltage with a simalar size battery. This is usaully cheaper. Everything is written on the battery.
No set answer to that, it depends on the size/capacity of the battery and what it's powering.
Depends which size of battery, what you are powering with it (motors take more power than radios), and which grade of battery you are using.
There are different sizes of batteries available to buy and they are have various alphabetical letters to categorize them. For example the "D" battery is normally used for things like huge torches as this size and type of battery is used for portable items that need extended battery life to operate them efficiently.