A system for battery gravitation-orientation detection. The system has a battery, an accelerometer fixed relative to the battery or optionally fixed relative to a battery housing, a processor programmed to: receive one or more signals from the accelerometer, compute a gravity direction from the one or more signals, and determine if battery or the battery housing is in a sub-optimum orientation for battery life based on the gravity direction and a relative alignment of the gravity direction to the battery or the battery housing.