Wondering how much your laptop battery has worn since it was new? NirSoft's free BatteryInfoView shows live charge, power status, voltage and capacity readings in one table, and it has a separate log for following changes in battery readings over time.
Battery Information groups live readings
The main view lists battery details such as manufacturer, battery name, serial number, and chemistry, along with current operating readings. Power status shows whether the battery is charging, discharging, or connected to external power. Capacity, voltage, and charge or discharge rate provide a snapshot of what the battery is doing at that moment.
For a health check, compare design capacity—the battery's original rated capacity—with its current full-charge capacity. A lower full-charge figure indicates that the battery stores less energy than it did when new. BatteryInfoView also displays a wear-level figure and the reported number of charge cycles, giving you additional context for the capacity readings.
Battery Log tracks readings over time
The separate Battery Log view records changing readings with timestamps. It includes battery status and values such as capacity, voltage, and charge or discharge rate. Looking across entries lets you see how those readings shift during a charging session or while the laptop runs on battery.
- Use Battery Information for the current snapshot.
- Use Battery Log to examine changes across recorded entries.
Capacity figures show battery aging
Design capacity and full-charge capacity answer different questions: the first is the battery's rated starting point, while the second reflects the capacity it currently reports when fully charged. A growing gap between them can indicate capacity loss. Cycle count and wear level add further battery-specific figures, while voltage and charge rate describe its current electrical state.
BatteryInfoView reports the values available from the laptop and battery. Some details may be absent when the hardware does not provide them.
Pros
- Shows design and full-charge capacity alongside current charge
- Includes voltage, charge rate, power status, and cycle count
- Separate log records changing battery readings
System requirements: Windows 7, Windows 8, Windows 8.1, Windows 10, Windows 11 · 32-bit and 64-bit
What battery details does BatteryInfoView show?
It shows capacity, voltage, power status, charge or discharge rate, and details such as cycle count, battery manufacturer, and chemistry.
What is the Battery Log for?
It records timestamped battery readings so you can follow changes in status, capacity, voltage, and rate over time.
How can I use the capacity figures to check battery wear?
Compare full-charge capacity with design capacity. A lower full-charge figure indicates reduced capacity compared with the battery's rated starting point.