https://stream.echo6.co/videos/watch/6f3af84b-c345-4934-8a25-b204cc1fed2d 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 EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog EEVblog Amazon Store (Dave gets a cut): http://astore.amazon.com/eevblogstore-20 T-Shirts: http://teespring.com/stores/eevblog Donations: http://www.eevblog.com/donations/ Projects: http://www.eevblog.com/projects/ Electronics Info Wiki: http://www.eevblog.com/wiki/ Fri, 15 May 2026 22:43:05 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://stream.echo6.co https://stream.echo6.co/client/assets/images/icons/icon-512x512.png https://stream.echo6.co/videos/watch/6f3af84b-c345-4934-8a25-b204cc1fed2d All rights reserved, unless otherwise specified in the terms specified at https://stream.echo6.co/about and potential licenses granted by each content's rightholder.