Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [battery-lifespan]

18 questions
16
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5 answers

Can lead-acid batteries be stored by removing the liquid from them?

I have two lead-acid batteries of the plate type, 12 V/100 Ah each, used for an inverter. I want to store these batteries for a year or two in a disconnected state. A friend of mine told me it's better to drain the batteries of the liquid they…
Anchovy
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Is there any scientific proof that passive cell balancing can improve the life of a battery pack?

Passive balancing usually works only in the charging end area, i.e. when the cells of a battery pack are almost fully charged. In the case of those cells that have already reached the end-of-charge voltage, a resistor is connected in parallel by the…
Medi1Saif
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What is the longest lasting (number of years or cycles) commercially available battery technology?

I'm asking this question because I felt that an answer would be useful to myself, and anyone else who might design a portable or other battery powered system that is meant to last several decades without requiring a new battery. What is the longest…
user4574
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Calculating degraded battery capacity

I'm working on a project where we want to predict the future battery degradation using the historical battery data. Now the battery capacity is an important value in this equation. I have done some research on the workings of batteries, battery…
Evert de la Ferté
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2 answers

Specific Li-po, Li-ion and charging facts (low intensity, slow)

I have the following battery, but not its original charger: 12 V, 4.0 Ah Cell Balancing Longer Battery Life Increased Battery Lifespan. Higher Battery Resources Due To Evenly Used Cells. BTW internally it has 6 cells, so 2 packs in parallel I will…
Daniel Perez
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2 answers

Need help determining LED run time given a certain battery

I have struggled to determine if a single CR2032 battery is sufficient to run some LED lights for a long enough period to replace the 2 AAA recommended for a DIY build. I'd like to use CR2032 instead to save on weight/size. I know a CR2032 is 3v…
efarley
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Reduce current pull in circuit

I have a Li-po battery (or any portable power source) providing 3.7 V output voltage. I want to connect a very small motor to it and have it power it for as long as possible. Here is the catch: the motor is pulling around 80 mA of current. This is…
BirdOfParadise
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Efficient Voltage Divider Battery Monitoring for 42V system

I'm designing a system that is powered from a 10S2P LiPo battery pack and I was looking for an efficient way to monitor the battery level. My microcontroller is 5V logic level, and I understand I can use a voltage divider circuit to step down the…
Barnabas Nomo
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What is the correct way to calculate system average current to find battery lifetime

I need to calculate the battery lifetime of a system. Usually I measure the average current and duration of each of the system's individual actions and from there calculate an average current projecting all the different actions to a 1 hour period.…
mmvgm1
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Measure mWh - mAh of an MCU-centered circuit

I build battery-powered circuits with MCUs that consume a few uA in sleep "stage." For total power consumption measurement (and therefore battery-lifetime), I used to use this but recently they changed its capacity range from 0.001Ah to 0.01Ah. I…
p_a321
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Trying to create a formula to estimate battery life for varied devices

I'm shopping for a AC Power brick like. Sometimes they're rated in mAh like this one and other times they're rated in mWh like this one To try to estimate the how long I can run a 10 watt LED wall lamp I'm doing this: mAh…
cbizy
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AA battery voltage as indicator of battery life

What is a good rule of thumb for the voltage at which a normal non-rechargeable consumer AA battery is depleted? Same question for normal rechargeable consumer AA batteries. Is the answer different for lithium-based AA batteries (as opposed to…
vicatcu
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Why does my phone charge/discharge quickly when charged in a car a using cigarette lighter charging adapter?

I have observed that when I charge my phone through a cigarette lighter charging adopter in a car, it charges up quickly and discharges quickly too. The same phone charges and discharges slowly when charged with a mobile charger. Why is that so? If…
Awais Saeed
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Lithium ion battery life

We are developing a device for automobile cabin use. It has 2 modes of operation, the first mode is where our device will be powered by the automobile battery through the USB port of the vehicle. The second mode will be powered by a 11.1 V…
Aasim shaikh
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Calculating reduction in electric car range with an additional load

I'm trying to estimate the average range reduction in mileage per hour of use of a constant electrical load within an electric car: Assumptions (Vehicle): $$ Usable \ vehicle \ battery \ capacity \ (B) = 84.7 \ kWh $$ $$ Vehicle \ range \ without \…
BleedObsidian
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