Uploaded June 2026 | Updated September 2026, 1 week ago

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Testing some 12 years old NiMH AA batteries. Can these Activ Energy AA cells still be used? Let's check their capacity and internal resistance degradation. How many mAh are still left? How long do these last?

The old battery analyzer:
danyk.cz/avr_aku_en.html

The new battery analyzer:
danyk.cz/avr_aku2_en.html

The internal resistance tester:
fnirsi.com/products/hrm-10?sca_ref=9216013.ntkg5GeG0R&utm_source=af&utm_medium=9216013&utm_campaign=standard-affiliate-commission

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