Over the past 25 years, varieties of sealed, dry batteries below 200 Amp-hours have proliferated. All new battery types, with different constructions and capabilities, give engineers and product designers more options - but also more opportunities for error. This concise guide aims to deliver answers to difficult questions about battery selection and to assure the right battery choice for a wide variety of applications. An earthquake sensor, a notebook computer, a low-temperature camera for arctic film expeditions - whatever the device, appropriate battery selection for safe, effective product performance can be assured. Designers and users also get current data on governmental requirements and industrial practices, plus historical background and information on new environmental issues in battery manufacture, use, and disposal - as well as a perspective on how the technology advanced and where it's headed.