How much capacity has this 20+yo 1000+ cycle Panasonic 14500 lithium ion battery lost?

00:00 – Panasonic electronic shaver teardown
06:30 – Battery dimensions match the type number
08:24 – The battery capacity test setup
10:40 – 500mA Constant Current test
11:38 – How much energy is left in a “flat” battery?
13:46 – 250mA Constant Current test
14:54 – 100mA Constant Current test
15:13 – Results analysis. Talking head Dave
19:11 – How to scale time in Excel
21:20 – How to get a characteristic battery capacity graph in Excel
24:35 – Energy in a battery and the characteristic curve area, it’s just an integral
26:30 – Optimising product design and battery cutoff voltage
29:13 – Battery current measured

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