EEVblog 1533 - How To Estimate Product Battery Life

How to estimate the battery life of a product. In this example, the BM786 multimeter. How to measure battery current accurately, avoiding Burden voltage, and looking at battery datasheets characteristic curves. The difference between alkaline and lithium primary batteries. If you find my videos useful you may consider supporting the EEVblog on Patreon: Why use AA’s instead fo 9V batteries in multimeters? Forum: 00:00 - What is the battery life of the BM786 multimeter? 01:55 - DaveCAD - Linear Regulators are Constant Current loads. 03:49 - The Rohde & Schwarz NGA100 PSU is pretty schmick 05:00 - The Burden Voltage problem 06:34 - Current consumption in AC mode and backlight 07:58 - The battery cutout voltage and hysteresis 08:48 - Why do multimeters waste battery capacity? 09:21 - Alkaline Battery Datasheet time 10:06 - DC-DC Converters are Constant Power loads 12:00 - How good are Energizer Lithium batteries? 14:26 - Temperate effect on lithium batteries 15:30 - Different types of characteristic curves 16:36 - Extraporlating the curve 18:46 - Conclusion Web Site: Other channels: EEVblog2: EEVdiscover: T-Shirts: #ElectronicsCreators #Battery #Measurement Теги: eevblog,video,battery life,calculating battery life,eastimating battery,estimate battery life,multimeter,bm786,power supply,burden voltage,what is buden voltage,alkaline battery life,lithium primary battery