| 摘要 |
An electrical power supply, particularly adapted for intermittent use, has an extremely long standby life. A series of squib actuated primary cell electrochemical reserve batteries are controlled by a selective activation circuit, so that each reserve battery of the series is activated only after the the preceeding battery has substantially spent its useful life. The circuit responds to a drop in battery output voltage signalling the end of the battery's useable life, to substitute the next battery in the series, and to activate it by firing its squib.
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