If your laptop battery has ever faded on you at the most inopportune moment, you will appreciate Electrofuel's PowerPad 160. You can rely on this Lithium-Ion (Li-Ion) polymer battery for a whopping 16 hours of power.
An external battery for portable computers, the PowerPad is about the size of a standard 8.5- by 11-inch sheet of paper. Weighing only 2.5 pounds, the PowerPad matches the footprint of most laptops. Electrofuel claims 435 watt-hours per liter compared to the standard battery, which lasts 30 to 40 watt-hours per liter. The self-discharge aspect is significantly better as well. Most Li-Ion batteries will lose only about 5 percent of their charge over a month; pretty impressive when compared with Nickel Cadmium (Ni-Cd) batteries, which lose
25 to 30 percent of their charge over the same time period. Electrofuel claims about 300 recharges before any significant loss of capacity.
Seemingly pricey at $499, the PowerPad 160 may be a real deal if you're always dependent upon a notebookcomputer. Cheaper batteries could quickly cost more than the price of PowerPad.
MANUFACTURER: Electrofuel; 866-302-2204; www.electrofuel.com
CONFIGURATION: Compatible with laptops from Toshiba, Gateway, Panasonic, Compaq, IBM, and Acer
PROS: 16 hours per charge; no "memory effect"
CONS: Not yet available for all laptops