Power consumption drives battery size.

It is sold with different battery sizes - for $58,750 it can go 160 miles.

Canister lights originated when the battery size required for sufficient burn time was too large to be conveniently carried in the diver's hand.

The two companies are also hoping to cut down on the profusion of battery sizes to make life easier for retailers, customers and battery makers.

This year there will be several electric cars with a range of battery sizes.

Ovonics is now working on AA cells, the most widely used battery size.

The first IEC standards for battery sizes were issued in 1957.

Several countries have established grants and tax credits for the purchase of new electric cars depending on battery size.

According to Protean Electric, its in-wheel motors can increase fuel economy by over 30 percent depending on the battery size and driving cycle.

The higher efficacy of HID lamps compared to halogen units means longer burn times for a given battery size and light output.