battery

Hello, I am in a research team and is designing a circuit system for powering a motor with battery and supercapacitor. The battery and supercapacitor powers the motor separately and the motor gives regeneration power back to the supercapacitor (motor driver allows for regen). Can experts in this...

Greetings. A vendor selling TP4056-based 5 V charging modules for Li-ion cells specified the following resistance values and resulting current for selecting the current-programming resistor: R (kΩ) I (mA) 30 50 20 70 10 130 5 250 4...

Hi, We are using a voltage divider circuit to measure the battery voltage of li-ion batteries of 3s2p configuration ( NCR18650B) The parameters are as following Vin- 12.24V r1= 604 k ohm r2 = 191 k ohm V out( expected) = 2.9V Vout (obtained) = 2.4 V. We measured voltage using multimeter at...

Hi, I have a 10.8V Bosch battery which is standard for power tools. It has 5 terminals: + - C1 C2 T I'd like to power the device without the battery using a DC power supply. When I apply just the right voltage to + and - it doesn't work. How am I supposed to mimick C1,C2 and T interfaces...

Hi, I would appreciate if someone would be able to comment/advice on the following matter. I have been looking around for an IC that would charge and balance Li-Ion cells 2-3 of them in series. It seems that the balance feature is absent in most cases. MCP73841 appears to provide most of the...

Is using a UPS i.e. APC Smart-UPS (4 battery) a recognized way to charge and maintain SLA batteries (AGM) throughout the year? Given that the batteries should be discharged about every 3 months?

hi guys, i try to make an automatic transfer switch dc for router 9VDC / 0.6A here. I want to switch automatically the power source from router adaptor to battery(power bank) that i set for power backup. and changing back when the router adaptor get an electricity again. i can't find the most...

New to electronics, I have a question. If I have a 12v power source that connects to a 12v battery that connects to a 12v load that is constantly on, would the battery drain of power?

I have designed a low battery detector circuit using low power comparator MCP6541 for a 4.2V Li-ion battery. This circuit checks whether the battery voltage if the battery voltage is lower than 3.5V then it will glow LED. Check the circuit below. The circuit is working properly but the...

Hi everyone, I’m seeking guidance. I have a tricky situation which I don’t really know how to get out of. I want to design a system which would consume the least amount of power possible. The idea is to have an ESP8266 do a simple task every minute (updating a e-paper display) and sleep the...

After many months of not using my Asus EeePad TF101 I have turned it on by plugging in the charger. After the boot the battery was 0% and I wasn’t surprised about this as I have not used the tablet for many months. I tried to charge it like before but after few hours it was still 0%. I found...

Hello! I’m in the process of trying to build a non-chemical battery. I sick a bit of guidance as I tend to go down an engineer rabit hole, because of the complexity that the project is aiming. My goal is to make some kind of object that could store enough energy to charge a smartphone’s...

Hello all! I am currently conducting my thesis research. My aim is to determine the most efficient way to combine high power density batteries with high energy density batteries in an hybrid system for powering electric aircraft. The idea is by using two different types of batteries which are...

Noob. I have a trailer that was broken into a few nights ago. I purchased a motion camera that records to an internal sd card. It comes with a power supply that has an output of 12v 1000mAh. My trailer is unattached to my truck for about 6 days out of the week. I'm wondering how to get...