![]() ![]() The meter's accuracy should be within 1-2% - it's been tested several times. This accounted for in the capacity calculations and keep that in mind when interpreting the discharge curves. Note that the battery pack isn't discharged with constant current, but is more like a constant-resistance load (~30Ω when using theĪforementioned settings). The described scenario with AA cells takes 12-14 hours to do a discharge. This cycle is repeated until the voltage drops below the desired threshold. 1.15s rest and an open-circuit voltage measurement at the end of it.4.8s discharge through a 22Ω resistor, at 90% duty-cycle PWM (this is specifically for AA cells įor others, the settings are listed in the respecive subsections).The discharge cycle has the following timings: What follows is another open-circuit voltage measurement, and after that the real test begins. Then, a heating phase - 30s at 300 milliamps - is performed I measure the momentary initial open-circuit voltage and write it down. I unpack the batteries and connect them to my battery tester. For this reason, I determined three types of tests: „one-hour“ (charging is done, the batteries are put to rest forĮxactly one hour, then they are discharged), „five-days“ (with a waiting time of five days) and „monthly“. Since the batteries lose some charge with time, it is important how much exactly do you wait after the charging is completed, before theĭischarge commences. ![]()
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