List of computer size categories. From Wikipedia, the free encyclopedia. This illustration shows the development of computers, from huge room-sized computers in the 1940s and 1950s (left-most photo) to smaller personal computers over the 1980s to the 2010s.
New US DOT Hazmat Safety Rule to Place Lithium Battery Limits in Carry-on Baggage on Passenger Aircraft Effective January 1, 2008. Passengers will no longer be able to pack loose lithium batteries in checked luggage beginning January 1, 2008 once new federal safety rules take effect.
How to carry batteries safely. Watch the CASA safety video - travelling safely with lithium batteries, to learn how to carry everyday batteries safely. Batteries under 100Wh rating. The batteries that power your phone, laptop and camera are usually under the 100 watt-hour (Wh) rating. If you're carrying a spare battery that's not in one of these devices, it must be in your carry-on baggage only. Spare batteries, regardless of their size are not to be carried in checked luggage.