04638237 is referenced by 46 patents and cites 3 patents.

A battery condition indicator provides an indication of both the charge used and the life remaining in a rechargeable battery. The time of use of the battery between charges is measured to provide an indirect measure of the charge remaining. The total time of service of the battery is measured to provide an indirect measure of the age or life of the battery.

Title
Battery condition indicator
Application Number
6/688327
Publication Number
4638237
Application Date
January 3, 1985
Publication Date
January 20, 1987
Inventor
Emilio A Fernandez
Fairfax County
VA, US
Agent
C Lamont Whitham
Assignee
Pulse Electronics
MD, US
IPC
H02J 7/00
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