Notes on Optimizing Battery Life
The article discusses strategies for optimizing battery life, focusing on the CR2023 lithium coin cell as an example. It emphasizes the importance of understanding current draw and battery specifications to maximize efficiency. Additionally, it highlights the impact of internal resistance and temperature on battery performance.
- ▪Measuring power draw in current rather than power is crucial for optimizing battery life.
- ▪Battery capacity is typically specified in milliamp hours, indicating how long a battery can support a certain current.
- ▪Internal resistance affects voltage drop when current is drawn, which can impact the usable capacity of the battery.
Opening excerpt (first ~120 words) tap to expand
Notes on optimizing battery life: 2026-05-27 (Electronics) Ok, so you have something with a battery, and you want it to run for a long time. I'll be using the classic CR2023 non-rechargeable lithium "coin cell" as an example, but everything here applies to other types of battery. (except the exact voltage and capacity numbers) First off, it helps to measure power draw in current and charge in well, charge. It is tempting to convert everything into power and energy, but don't. Most circuit's power draw is much closer to constant current than constant power: a single clock cycle on a microcontroller involves charging or discharging some number of MOSFET gates. That requires some number of coulombs, not some number of joules.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Maurycyz.
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