06888468 is referenced by 80 patents and cites 316 patents.

A battery discharge indicator for protecting a storage battery is provided. The battery discharge indicator includes a positive connector that can couple to a positive terminal of the battery and a negative connector that can couple to a negative terminal of the battery. Also included, is a voltage sensor that couples to the battery via the positive connector and the negative connector and senses a battery terminal voltage. A microprocessor, coupled to the voltage sensor, provides a first alarm signal if a magnitude of the battery terminal voltage is below a first threshold for a first interval of time and if the magnitude of the battery terminal voltage is below a second threshold for a second interval of time.

Title
Apparatus and method for protecting a battery from overdischarge
Application Number
10/349053
Publication Number
6888468 (B2)
Application Date
January 22, 2003
Publication Date
May 3, 2005
Inventor
Kevin I Bertness
Batavia
IL, US
Agent
Westman Champlin & Kelly
Assignee
Midtronics
IL, US
IPC
H02H 005/04
H02J 007/00
G21B 021/00
View Original Source