Ampere-Hour Meter For Rechargeable Battery
Timothy Schott, Ping Tcheng, John S. Tripp · NASA Tech Briefs · 1993
Low-power analog/digital electronic circuit meters discharge of storage battery in ampere-hours. By metering discharge, one obtains indication of state of charge of battery and avoids unnecessary recharging, maintaining capacity of battery and prolonging life. Because of its small size and low power consumption, useful in such applications as portable video cameras, communication equipment on boats, portable audio equipment, and portable medical equipment.