Battery Definition and 1000 Threads

Hey everyone, So I'm trying to figure out what could be causing this problem: I have a DEWENWILS Wireless Remote Wall Switch which takes a 12V battery 60 mAh(23A battery), when I replace the battery with a 12V 500 mA DC power supply, the unit stops working properly. I'm able to use the Power...

I have this adaptor. Do you know what kind of battery power pack that can output at least 9 volts 0.5 ampere? This is the spec sheet: https://www.jameco.com/Jameco/Products/ProdDS/163628.pdf It's the adaptor included in the world's cheapest (and only) 2 channel pm2.5 monitor. A 16 channel...

Homework Statement:: How can I determine whether my basic circuit will work? A battery and two light sources. Homework Equations:: conceptual question, use basic ohms law, current law, voltage law, etc. This is not a homework question, i am just trying to understand electronics better. I am...

I'm looking at two different batteries for home energy storage. Both batteries have a coulombic efficiency in the upper nineties, say 96%. One battery has an energy efficiency of 90%, and the other has an energy efficiency of 60%. I believe both ratings represent loses of usable energy, but I...

We are incorporating a PDLC layer into a product being developed by us and it requires almost constant activation to remain transparent. The PDLC draws 0.557 Watts of power per hour at 60VAC. The goal is to get a battery/power source (of any type even proprietary) to last the upwards of 26,000...

I have read that the potential V = E*d for a constant electric field E, so this is related to the battery voltage of some voltage say 12v etc. Because battery will produce voltage using chemical reaction. Above two are different concepts or related? Please advise.

I am performing some calculations but struck with confusion whether I am doing it correct or wrong due to contradictions of these calculations on different calculators websites. I hope here someone will help me with the validation of my calculations. Battery Capacity = 150 Ah Battery...

Hi. Could anyone guide me as to what equipment and considerations I need for maintenance charging a battery bank used as solar storage. The bank consists of 8, 6v deep cycle lead-acid batteries (Rolls batteries: S6- GC2-HC) The solar system is for a seasonal application and the shed they...

I have a question about battery cars. in our common household electrical appliances like the Fan, light i.e. gadgets having regulator attached to it consumes the same amount of energy whether in full power or at the lowest. Because the extra power will be channelled through resistance inside the...

You can make a fuel cell with hydrogen and oxygen gas, but can you make a battery with a tank of hydrogen and a tank of oxygen?

Gravity batteries intrigue me. We are starting to develop them now. We currently are able to drop cement blocks and harness the energy that the kinetic energy releases. We are considering them as an alternative energy source to help the environment. Here’s a link for those unfamiliar with it...

Found this online I added 3 volt battery how do you figure out what size resistor to use?

Hello If we have two bottles with solutions with HCL at different concentration. Can we produce energy out of it? How can I calculate how much? Thanks!

Hello, This is an enquiry about the wind turbine electricity and battery storage. I am framing it based on my limited understanding. Please advise me. I intend to install and capture the wind energy through a small wind turbine at my home. The turbine shaft will be directly connected to the...

In a simple circuit with battery connected to a resistor or a combination of resistors where is the electric field directed . What do we mean when we say battery creates a potential difference between two points in a conductor? And by the statement that battery moves positive charge from low...

I am researching the electrochemistry of redox flow batteries, however, I do not understand the charging process. As I understand DC current arrives in an electrode and transfers energy to excite electrons in the electrolyte thus providing energy to trigger a chemical reaction (storing...

So I just connected a zinkplate and a copperplate in series with a battery 9v and a coil(with a an iron core). All the parts are from a set bought for learning about electricity. Since I was a kid I have many time put the + and the - of a 9V battery on my tongue, and felt the electricity. So...

In a zinc / copper danielle cell could we say that the Zinc electrode is like a glass of water (water molecules are electrons) The full glass of water reprenst the charge of the zinc electrode and when you try to fill it with more water it overflows (electrons leave the zinc electrode)

If you place a zinc / copper battery it will create an electric field pointing from the copper to the zinc and my question is this what makes this electric field , the zinc pushes electrons in the circuit and never "stays" negatively charged for an electric field to be created same for the...

When using two cars to jumpstart a dead battery. Why can't you connect the negative jumper cable to the negative terminal of the dead battery (which is what I commonly do) but instead need to connect the negative jumper cable to grounded metal...

I've replaced the charger for my DeWalt tools several times, and now I may have to go out and get a fourth one. One of them flashes a fault warning (steady slow flash), the other two do not light up at all. Now, I do not take care of my tools. All three of these chargers may have been exposed...

Hi All, So i am looking to buy a petrol generator to run a 2.2KW electric motor. I was thinking of getting a 3KW model which under normal conditions this should be ok - but on start up I've been told an electrical motor draws 6 to 10 times the normal load, which is way too high for the...

Hi, I was reading about CMOS BIOS which was once used in computers to store BIOS settings is a CMOS RAM using a battery backup. This article, https://www.makeuseof.com/tag/why-does-my-motherboard-have-a-battery/, says, "If the battery fails on an older computer that stores its BIOS settings...

A very useful homemade construction. We can safely connect all kinds of rechargeable batteries. We need a car battery between 35-44 Ah (Here the battery is 100 Ah but we don't need so much current) , a strong relay from a scooter or a motorbike or from a...

Hello all: I have a question about electric car battery ? What is the best charging method for the battery ? Is it high ampere charging or high voltage charging ? Thanks in advance H

Hi all - I have a question on the redox reactions in Li ion batteries. I'm not being able to figure out where the Li-> Li+ + e- half cell reaction is actualy happening. Take the standard LCO reaction: LiCoO2 + C6 -> LiC6 + CoO2 (in reality, only 50% of the Li reacts this way, but let's ignore...

I created a simple battery. I used a copper cathode and zinc anode resting in a saturated solution of NaCl (about 25% NaCl by mass), connected by alligator clips to a voltmeter. I received a voltage of .85V, whereas the theoretical voltage should have been about 1.10V. That's not of too much...

Conceptually this question makes sense to me I know a overcharged lithium battery will became unstable however with identical batteries except a different level of charge what would the properties of their combustion be? In depth conceptual, and mechanical explanations are always appreciated as...

Homework Statement [/B] A car battery with a 12v emf and an internal resistance of .040 ohms is being charged with a current of 50A. A.) What is the potential difference across the terminals? B.) The rate of energy dissipation in the battery Pr. C.) the rate of energy conversion to chemical...

Hi there, we are developing a small consumer electronics product consisting of a small 4-layer PCB along with a few PDM microphones and BLE chip/ and antenna, as well as a LiPo battery. We are locating a small but pretty strong magnet next to these components in the enclosure. It is an N52...

Please help me. How many times I can charge my 5000mah mobile from 12 volt 7ah battery. I will use dc mobile charger.

I've read about light slowing materials, and I'm wondering if you could slow down light enough, could it be used to say store light from the sun during the day so solar panels could work at night? Or would it not work because the process of slowing light down gradually absorbs some of the...

I got a battery management board. According to the specs the charging Voltage is 12.6 to 13 volts. What if it Is a little more say 13.7 volts. Will it Still recharge the 18650 lithium ion Cells at 13.7 volts.

<< Mentor Note -- thread moved to the Sci-Fi writing forum after starting in the technical forums >> Hey folks, I'm interested in the feasibility of providing high DC voltages (~kV) in a physically small and low mass package (~grams). The power source does not actually need to be very energy...

We have a Toyota Etios Liva, four years old, petrol variant. Today, my father took it for annual servicing at the authorised service centre, where the service personnel declared that the battery was "dead". Our car is not used much. Usually on an average, it is driven for around 14km per month...

I know this is not ok but just for a few seconds or minutes and for the purposes of "boiling" the acid a little to make it even, break some sulfate deposits off the plates and recover a young battery that was neglected for a few months, what current would a 12 V / 480 A / 85 Ah lead-acid car...

Is it feasible to recharge satellite's batteries utilizing a ground-based laser?

Homework Statement The above circuit shows two cells of emfs E1 and E2 and two resistors with resistances R1 and R2. If E2 is short circuited, then what is the current through R1? Homework EquationsThe Attempt at a Solution First of all, i am not sure what it exactly means when a cell is...

Why the voltage of an exhausted battery, in open circuit state, is almost identical with that of new battery? The internal resistance of an exhausted battery is very large and so, the large amount of energy consumed by the source (for overcoming the electric filed in the battery) would waste in...

It beeped when I had removed battery and disconnected it from ceiling. The power has to come fromm somewhere, so how could it beep?

Homework Statement Homework Equations CMRR = Av/Acm Acm= Δ/R , Δ = (2 x Tolerance of Resistor).R The Attempt at a Solution I have to admit I am a bit confused by the premise of the problem. My understanding is Vout is used to vary Vcharge in some way, so that Icharge is always 1.3 A. Then...

Hello everyone ! I'm Hugo. I'm a french high school student. This year I've a project on new way to store electricity and their materials.I've done researches on super capacitors. But I've found only that "new way" to store electric energy. And for the material part, I don't know what I can...

If you've seen breaking bad you probably already know what I'm asking. in this episode I'm watching, they are hand cranking the generator to recharge the battery. They are moving nowheres near as fast as the motor would have spun it. My dad had a hand crank device that was, more or less, a toy...

Hi everyone. I'm interested in building a basic nickel-iron battery. I was wondering if both plates can be made off of nickel-iron alloy (35% iron and 65% nickel). How will the efficiency of this model differ compared to if I use iron and nickel plates separately?

I was told once that two 1 amp tv type diodes parallel will not work because one will always carry the load, but I am working on a car 30 amp battery charger and it has 6 diodes 1/2" press in type all parallel same as from a 10DN series Delco alternator from the 60's where they used three...

I'm sorry if this question is a little abstract, but would appreciate any guidance! It's for a DIY project I am considering. Suppose you have a flat panel mounted on a wall, and a very strong magnet that will move in any direction on the plane of the flat panel. Through any possible arrangement...

Let's say both battery have the same charge capacity of 3Ah Battery A has voltage of 3V and B has voltage of 6V. Battery A is completely discharged while B is completely charged. If I charge battery A with battery B, wouldn't B be completely drained because they hold the same amount of charge...

After watching a video on YouTube, I recently became interested in the dynamics and physic's of why we aren't using electrical powered planes instead of burning thousands of fossil fuels every day. After doing a bit of my own research, I found the problem. When we increase the weight, we have to...

I am a graduate nuclear engineer(no Master yet), and I ask if nuclear battery(radioisotope thermoelectric generator, that use plutonium-238 as heat source) can be simulate by MCNP5. And is their any card in MCNP5 treat or deal with thermoelectric converions. Thanks

I am experiencing weird problems with my phone. It is a Samsung Galaxy On7, running Android 6.0.1, updated to the latest version, unrooted. Since some days, the battery is falling very fast. For example, if I charge my device to 100%, open chrome and start writing this thread, at the end, it...