inrush current
The circuit itself is working as expected but the voltage drop on even a 10.000mAh battery is so high that the battery triggers the undervoltage protection on startup when the battery is at about 3.5V. I tried to smooth the
eli5: Why does it matter which direction batteries are placed in
When you put more than one battery in a device, the circuit is setup to connect the negative of one battery to the positive in the next one - this is called series connections. This adds the voltage. Since many electronics work at 3 volts, and a AA or AAA battery is 1.5 volts, you usually need two batteries to make it work.
How to reduce current? | Electronics Forum (Circuits, Projects and
I''m currently building a battery-charger based on **broken link removed** ciruit, but I can''t seem to figure out how to reduce current flowing, without getting a massive voltage drop. I tried with a resistor in serie, but the voltage dropped below the voltage of the battery to be charged, making the circuit useless.
Since batteries are essentially reduction-oxidation reactions, why
When the charger sees this, the constant current circuitry will reduce voltage until current falls into its "ok" range (say below 400mA). If it''s a true short (no resistance) and all components are ideal, then eventually the charger voltage will end up matching the battery voltage perfectly. This will be a steady stage where no current flows.
ELI5 Why are large batteries just many small ones connected
Most large batteries also have high current drain. There needs to be a way to manage the heat build up. Smaller cells assembled together in large groups allows for efficient cooling. ELI5: Why can''t electric cars be designed so the battery can
ELI5: Why can''t we charge batteries using AC power?
Batteries are inherently DC...the chemical reaction driving the battery is either discharging or charging...either way it''s DC, just in opposite directions. If you hook AC to the battery will
Why Laptop Battery Life Decreases: Causes Of Sudden Drain And
Why Do Extreme Temperatures Reduce Battery Efficiency? – Internal resistance: The resistance to current flow inside the battery, which can increase at low temperatures, causing energy loss. Mechanisms behind these changes involve electrolyte behavior. The electrolyte is the medium that allows ions to move between the anode and
Why Can''t We Store AC in Batteries instead of DC?
Why AC Can''t be Stored in Batteries like DC? We cannot store AC in batteries because AC changes their polarity up to 50 (When frequency = 50 Hz) or 60 (When frequency = 60 Hz) times in a second. Therefore the battery terminals
Electric current and potential difference guide for KS3 physics
An electric current can flow in the wire from one end of the battery to the other, but nothing useful happens. The wire just gets very hot and the battery loses stored internal energy – it
Why can''t we store AC in Batteries instead of DC?
Why can''t we store AC in Batteries instead of DC? Electrical energy is not stored directly in a battery. The battery stores electrical energy in the form of chemical energy. Imagine that an alternating current (AC) is supplied directly to a rechargeable battery, with the negative terminal of the AC source connected to the negative
Why Can''t Lithium Batteries Go in Checked Luggage?
To help reduce the risk of these incidents, the FAA encourages fliers to check for recalls or damages to their devices, as they''re more "likely to create sparks or generate a dangerous evolution of heat.". Passengers can
How to reduce current?
I am rejuvenating an old cordless battery powered iso tip vintage soldering iron. The charger''s transformer is bad. The original charger is supposed to supply 2.4vdc @ 375ma. Question, I have many wall warts and want to use an old phone charger rated at 5vdc and 1a. What is the simplest way...
do devices pull more current at lower voltage? | Electronics Forum
Most battery operated devices use switching regulators to generate the required voltages - in these cases the current will rise as the voltage falls. Other devices using linear
ELI5: Why can''t batteries be recharged infinite times?
You can''t get more energy out of a system than is put into the system. This means you can''t get cake if you don''t put the effort into making the batter. You have to get up and put the effort in to get the goodies out. The second law of thermodynamics; you can''t break even, means there will always be some energy lost from the system as entropy.
Why can''t normal batteries be recharged? : r/askscience
''Normal'' batteries use Zn oxidation (Zn=>Zn2+ + 2e-) as the primary source of energy. When you ''recharge'' these batteries you must reduce the Zn cations back to Zn metal. The Zn metal layer will grow on the current collector. Ideally you would
Derating of Lithium-ion Cells | Relationship between SoC, C rate
Why does battery charging speed reduce significantly after 90%? That is because of high SoC-level derating of charging current/power. Why does a cell phone stop functioning
Why Can''t We Store AC in Batteries instead of DC?
A frequently asked question is, "Why can''t we store AC in batteries instead of DC?" To answer this, we need to explore the nature of electrical currents, battery design, and
batteries
Watts are volts*amps or in your cases battery voltage times 1A, or battery voltage * 2A. So twice the power for half the time is the same amount of energy drained from your battery. EDIT: If the question is why would the battery capacity decrease over the expected ideal, then Brian''s comment is the answer.
Why do batteries decrease in voltage as they are consumed
Why do batteries decrease in voltage as they are consumed, instead of available current? As I understand, volts are intrinsic to the difference in electric potential of the cathode and anode. If
How to Reduce Amperage [Explained]
Electronics: Adding current limiting resistors to LEDs or sensitive ICs prevents damage. Motors: Putting resistors or inductor/capacitor filters minimizes inrush current. Batteries: Preventing excessive discharge currents extends battery
Question: Why Can''t You Use Rechargeable Batteries In Some
Rechargeable batteries reduce waste and can save you money in the process, but they also contain some toxic substances, as do car batteries. AA batteries and AAA batteries are used to power a wide range of devices, but even eco-friendly, rechargeable units can still cause harm to the environment.
Why do batteries decrease in voltage as they are consumed
Also as I understand, current is a function of how fast the rate of reaction between the cathode and anode is. Given that this rate is a function of how much material there is as well as how "contaminated" they are, shouldn''t a battery maintain its voltage as it''s being consumed, and reduce its available current?
Resistor to reduce charging current on a LifePO4? : r/batteries
Theoretically possible but the resistor will drop voltage because of the current so the battery won''t see the voltage the charger is delivering this can mess up the charging and potentially damage the battery, but also an in line resistor will drop a decent amount of power with 10A through it
ELI5: Why can''t you recharge regular batteries?
Zinc-Carbon batteries do not currently come in a rechargeable variant, although there is no physical reason why they could not be recharged. Like Alkaline batteries, applying a charging current to them will reverse the reaction, but since they are not designed to be recharged, may explode from pressure.
Why can''t a primary cell be recharged?
Irreversible in this context isn''t a thermodynamic or kinetic thing, necessarily. It simply means that applying a current in reverse doesn''t result in the original reagents. It may be that there is another possible reaction at a similar redox potential that leads to a different compound being formed or that the manner in which it is deposited is not suitable, e.g. the zinc
How to Reduce Amperage [Explained]
Motors: Putting resistors or inductor/capacitor filters minimizes inrush current. Batteries: Preventing excessive discharge currents extends battery life. Generators: Limiting current draw prevents overload and improves fuel
ELI5 Why can''t we just use batteries? : r/explainlikeimfive
Assuming the transport vehicle begins in the desert, you''d need the energy to load the batteries onto the transport (cranes/lifts), then transport those batteries (the weight reducing efficiency of the transport vehicle) throughout the world, energy to offload (which in this scenario uses the batteries from the transport vehicle), then energy to get back to the desert (also using the
amperage
You are wasting a considerable amount of power in your dropping resistors. One way to reduce the total power consumption would be to put all of the LEDs into one series string along with a low-value current sense resistor, and then use a
How exactly does a resistance reduce current?
To be clear, adding a resistor to the circuit does reduce the current that flows through the entire circuit (as compared to the circuit without the resistor). However, the current at two points in
Why does motor current increase when voltage decreases?
This should cause the current to increase along this circuit. Why? so the current taken increases. If you reduce the voltage to an induction motor, then it will produce less torque for the same "slip" speed. For the same load, the motor will run slower, less reverse voltage will be generated due to the slower speed, meaning there is less
Why can''t batteries last forever: And what we can do
A better understand of what kills Li-ion batteries is not only beneficial to avert the impending e-waste crisis, it is also to the advantage of the user that the battery maintains its health for as long as possible to delay the need to replace the
Why Can''t We Store AC in Batteries instead of DC?
Why AC Can''t be Stored in Batteries like DC? We cannot store AC in batteries because AC changes their polarity up to 50 (When frequency = 50 Hz) or 60 (When frequency = 60 Hz) times in a second.Therefore the battery terminals keep changing i.e. Positive (+ve) becomes Negative (-Ve) and vice versa, but the battery cannot change their terminals with the same speed so
6 FAQs about [Why can t batteries reduce current ]
Why does battery voltage decrease?
Basically capacitance is the same but the charges required to reach the batteries potential are less, which is as good as saying less capacitance. Coming to why voltage will reduce is because the opposite plate has charges as well and hence the difference in the opposite plate and the plate connected to battery is less.
What happens if a battery is no longer useful?
Once a battery is no longer useful, the type and chemistry of the battery determines which of the various waste management options to use. It is important to manage batteries correctly according to their type because some batteries can cause a risk to safety and health if mismanaged at the end of their lives.
What happens if battery current is lower than Spec?
If the battery current is lower than the specified value, it will charge more slowly. On the upside, a lower current tends to be more gentle on the battery since it won't generate as much heat. I have worked in cellphone sales and service for 5 years, and in computers for 15 years.
Why do batteries lose energy if not used?
Primary cells maintain a positive charge on the positive terminal and a negative charge on the negative terminal, month after month. These charges attract another and sometimes manage to get to each other through the battery it self. When this happens the battery loses some energy. This is why batteries lose energy if not used.
What happens if a battery voltage rises?
As the battery voltage rises, the drop across the resistor will fall. This will reduce the current, unless you are monitoring it every few minutes and adjusting the supply up to compensate. Quick to do as a one-off, very tedious if you have to do it more than twice!
What happens if a battery voltage is too low?
When the battery is charged with too low a voltage, or operates at too low a voltage. The acid/distilled water mixture needs a full voltage applied across the battery to mix properly. If the voltage is consistently below around 80%, this mixing will not happen. Why may the voltage be too low? This can happen if: