Predicting the Data Retention Lifetime of a Lithium Carbon Mono-Fluoride Battery Connected to a Zeropower RAM

Accelerated temperature testing of lithium carbon mono-fluoride batteries has identified two mechanisms which limit the useful lifetime for battery back-up. One mechanism, electrolyte evaporation, has a relatively high thermal activation energy and will limit the current producing capability of the battery. The other mechanism, lithium consumption, has a low thermal activation energy. The current drain required to retain data in the RAM has also been characterized. With this data, a model will be presented which could be used to predict the useful lifetime of this system.