EEVblog #772 - How To Calculate Wasted Battery Capacity

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EEVblog

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Published on July 28, 2015 4:02:01 AM ● Video Link: https://www.youtube.com/watch?v=1hs_9vx9APw

Category:

Tutorial

Duration: 36:02

47,090 views

2,037

In this tutorial Dave explains how to precisely measure and calculate the remaining (or wasted) energy capacity in a battery using the graphical analysis technique using a spreadsheet.
The differences between constant power and constant current loads and when to use them is discussed.
Also, the importance of ESR and measuring the battery voltage under load is demonstrated.
This is a particularly relevant to the Batteriser product and proof is provided that shows that even over the entire current range, the wasted energy in a battery can be no better than a few 10's of percent for a 1.1V cutout voltage. Blowing the batteriser claim of 80% wasted energy out of the water.
Forum: http://www.eevblog.com/forum/blog/eevblog-772-how-to-calculate-wasted-battery-capacity/

All of my battery related videos are here: https://www.youtube.com/playlist?list=PLvOlSehNtuHtj5Ubhx7govoBfNkyUO4Pp

DIY Constant current load: https://www.youtube.com/watch?v=8xX2SVcItOA
Battery Capacity Tutorial: https://www.youtube.com/watch?v=R8hTQXqURB4
AA Battery Capacity Measurement: https://www.youtube.com/watch?v=uT4hKd66UY4
Batteriser Debunking Video: https://www.youtube.com/watch?v=4iEshd6izgk
LiPo Battery Discharging: https://www.youtube.com/watch?v=ln8Mlz4NsW8


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