EEVblog

EEVblog 1732 – 20yo 1000+ Cycle Panasonic Li-Ion Battery TESTED

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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

Forum: https://www.eevblog.com/forum/blog/eevblog-1732-20yo-1000-cycle-panasonic-li-ion-battery-tested/

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EEVblogBy David L. Jones
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