Date/Time stamp: 2025-08-15, 14:03 — this is when the test was run. (Worth noting as a teaching aside: this date was actually wrong on the device — a good example that a machine's internal clock is a separate, trivial setting from its actual measurement accuracy. Don't let a wrong timestamp make you distrust the electrical readings themselves.)
TEST REPORT / BATTERY TEST / REPLACE BATTERY — this is the tester's final verdict, printed in bold as the headline result. Everything below is the data that led to this conclusion.
Now the core readings, explained one by one:
- SOC: 98% (State of Charge) — how full the battery is right now, like a fuel gauge. This just means it was charged at the time of testing. This number alone tells you almost nothing about the battery's actual health.
- Voltage: 12.70V — the resting voltage across the terminals. A healthy, fully-charged 12V battery normally sits around 12.6-12.8V, so this looks completely normal on its own — another number that can mislead you if you stop here.
- SOH: 38% (State of Health) — this is the real headline number. It measures how much usable capacity remains compared to when the battery was new. At 38%, the battery has lost roughly two-thirds of its original ability to perform, even though it's currently charged.










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