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

How much capacity has this 20+yo 1000+ cycle Panasonic 14500 lithium ion battery lost?00:00 - Panasonic electronic shaver teardown06:30 - Battery dimensions match the type number08:24 - The battery capacity test setup10:40 - 500mA Constant Current test11:38 - How much energy is left in a "flat" battery?13:46 - 250mA Constant Current test14:54 - 100mA Constant Current test15:13 - Results analysis. Talking head Dave19:11 - How to scale time in Excel21:20 - How to get a characteristic battery capacity graph in Excel24:35 - Energy in a battery and the characteristic curve area, it's just an integral26:30 - Optimising product design and battery cutoff voltage29:13 - Battery current measuredForum:Web Site: http://www.eevblog.comHardware Store: https://eevblog.store/Merch Store: https://eevblog.dashery.com/If you find my videos useful you may consider supporting the EEVblog on Patreon: http://www.patreon.com/eevblogOther channels:EEVblog2: http://www.youtube.com/EEVblog2EEVdiscover: https://www.youtube.com/eevdiscover#ElectronicsCreators #Battery #lithiumbattery...https://www.youtube.com/watch?v=RYAjIq4XCQY