Скачать или смотреть 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.

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Why use AA's instead fo 9V batteries in multimeters?
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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

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