Definition
The state of an aircraft battery's electrical energy level at a given moment, expressed as whether the battery is being charged by the alternator or generator, holding steady, or being discharged by drawing more current than the charging system is supplying.
Plain English
Whether the battery is gaining power, holding power, or losing power right now.
Context Anchor
Seen during alternator or generator failure checks, usually when reading an ammeter, loadmeter, battery indicator, or electrical warning light.
Derivation
Charge comes from the idea of loading something. In electrical use, a battery is “charged” when it has stored electrical energy available. Condition means state, so charge condition means the present state of the battery’s electrical charge.
Why Pilots Care
Tells the pilot immediately whether the battery has backup power remaining or must be conserved to keep essential instruments and radios operating.
Intuition Check
Do not read charge condition as a fee or cost. In this context, charge means stored electrical energy in the battery, and charge condition means whether that stored energy is increasing, decreasing, or holding steady.
Example Sentence 1
After the alternator warning light came on, the pilot checked the charge condition on the ammeter and saw the battery was discharging.
Example Sentence 2
After the alternator failed, the charge condition turned negative, so the pilot turned off nonessential equipment to save battery power.