This would also explain the differences in the voltage requirements.

However, the concern with using a diode stems from parasitic currents to neighboring cells, as well as a higher voltage requirement.

Yeah, the reason is that it saves a transformation level, and that it's close enough to the voltage requirements.

Lower voltage requirements leads to lower power requirements, and lower heat output.

Transverse voltage requirements can be reduced by lengthening the crystal.

These transformers are used when electrical equipment has a voltage requirement that is slightly out of tolerance with the incoming power supply.

Users must know the voltage requirements of their appliances as well as the prevailing local voltage.

As technology developed further, the voltage requirements for lights dropped, and subsequently the size of the batteries was reduced as well.

Some, such as you'd find in a machine shop or a sawmill, have special voltage requirements.

It also boasts the smallest physical size in its class - 78.5 square millimeters - and the low voltage requirement of 1.8 volts.