SANTA CLARA, CALIF. NEC Electronics' newest rechargeable battery cells use a laminate film for the casing rather than conventional aluminum or steel, enabling small, light batteries. Moreover, the proprietary manganese-spinel cathode material "offers a superior degree of safety against overcharging compared to cobalt-based cells," said Michael Hasegawa, senior marketing manager of the Energy Devices Group.
The three products come in a soft-pack format with integrated safety circuits, allowing ease of design. NEC says the high-energy-density cells (roughly 290 W-hr/liter), in particular, mix the thin form factor and light weight of polymer types with the performance advantages of metal-can prismatics.
The IML270330-2 (at 150 mA-hr), 270530-2 (300 mA-hr) and 350362-1 (580 mA-hr) are aimed at mobile communications such as cell phones and wireless Internet devices. Weighing in at 5, 8 and 15 grams, respectively, they are being touted for use in slim, next-generation PDAs.
Samples are available now, at $30. Cells will be available in quantity this quarter at $15 each in lots
of 10,000. Comprehensive technical support is provided during the design-in phase.
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EETInfo No. 607