@fegelein3290 typically you would measure voltage either open circuit or at a known (light) load, and then extrapolate from a curve of predicted discharge. Actually measuring how much current has flowed out of the battery is a more accurate approach and it is called “coulomb counting”. You need to look at the SOC (state of charge) for your battery as well as many other variables. Here is some interesting reading about that [document|6333] There is no easy way to determine how many mAh are left in your battery. Best place to learn about batteries imho is [https://batteryuniversity.com/learn/|on here]
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=== Update (02/05/2020) ===
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@fegelein3290 check the answer to this question [post|581009] as well as this guide [guide|125804]
@ fegelein typically you would measure voltage either open circuit or at a known (light) load, and then extrapolate from a curve of predicted discharge. Actually measuring how much current has flowed out of the battery is a more accurate approach and it is called “coulomb counting”. You need to look at the SOC (state of charge) for your battery as well as many other variables. Here is some interesting reading about that [document|6333] There is no easy way to determine how many mAh are left in your battery. Best place to learn about batteries imho is [https://batteryuniversity.com/learn/|on here]
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@fegelein3290 typically you would measure voltage either open circuit or at a known (light) load, and then extrapolate from a curve of predicted discharge. Actually measuring how much current has flowed out of the battery is a more accurate approach and it is called “coulomb counting”. You need to look at the SOC (state of charge) for your battery as well as many other variables. Here is some interesting reading about that [document|6333] There is no easy way to determine how many mAh are left in your battery. Best place to learn about batteries imho is [https://batteryuniversity.com/learn/|on here]
Typically you would measure voltage either open circuit or at a known (light) load, and then extrapolate from a curve of predicted discharge. Actually measuring how much current has flowed out of the battery is a more accurate approach and it is called “coulomb counting”. You need to look at the SOC (state of charge) for your battery as well as many other variables. Here is some interesting reading about that [document|6333] There is no easy way to determine how many mAh are left in your battery. Best place to learn about batteries imho is [https://batteryuniversity.com/learn/|on here]
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@ fegelein typically you would measure voltage either open circuit or at a known (light) load, and then extrapolate from a curve of predicted discharge. Actually measuring how much current has flowed out of the battery is a more accurate approach and it is called “coulomb counting”. You need to look at the SOC (state of charge) for your battery as well as many other variables. Here is some interesting reading about that [document|6333] There is no easy way to determine how many mAh are left in your battery. Best place to learn about batteries imho is [https://batteryuniversity.com/learn/|on here]
Typically you would measure voltage either open circuit or at a known (light) load, and then extrapolate from a curve of predicted discharge. Actually measuring how much current has flowed out of the battery is a more accurate approach and it is called “coulomb counting”. You need to look at the SOC (state of charge) for your battery as well as many other variables. Here is some interesting reading about that [document|6333] There is no easy way to determine how many mAh are left in your battery. Best place to learn about batteries imho is [https://batteryuniversity.com/learn/|on here]