All Questions
Tagged with low-battery battery-charging
26
questions
0
votes
0
answers
31
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Why would a battery pack read as a lower voltage before being disconnected from device, then read as a higher voltage after [duplicate]
I'm working on a device that uses a proximity sensor to count the number of times something passes through its field of view at a certain distance. It is connected to an Arduino Nano and a battery ...
- 349
1
vote
1
answer
500
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Ultra-low power low battery disconnect circuit
I am trying to design a circuit to replicate the behavior of the LTC4071 battery charger/protector IC (see datasheet here). In particular I want to replicate the low battery disconnect function which ...
- 121
1
vote
1
answer
768
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Dual cell protection using DW01
I am using GS7001B-84 dual cell charger to charge battery. Now I want to protect these two cells. I have DW01 battery protection IC and AP2302B N channel mosfet. How can I protect battery using these ...
- 57
1
vote
0
answers
228
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Relay Buzzer Circuit
I'm trying to set up a circuit to protect a battery in a battery box, using some parts I had lying around. Its job is to open the primary relay (load/charging) and sound a buzzer when the supply drops ...
- 11
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votes
1
answer
1k
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12 V, 7 Ah SLA battery reads 0 (zero) volts
I have a new 12 V, 7 Ah battery which reads 0 (zero) vokts. Let me explain the situation. I have a 800W UPS (for pc) whose battery wasn't giving enough backup. So I decided to replace the battery. I ...
- 1
0
votes
1
answer
257
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Battery Charger Cut off
I need to confirm that this circuit will protect battery against over charging or not.
https://bestengineeringprojects.com/12v-7ah-smart-battery-charger-with-pcb-diagram/
Which is better circuit for ...
- 1
0
votes
1
answer
59
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Questions about Li-Ion batteries
I am working on integrating single 4.2V Lithium battery(400mAh capacity), charger IC, and battery fuel gauge for an embedded project.
I have watched several TI training videos about battery management,...
- 261
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votes
2
answers
2k
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What should a 12v solar battery read while in use?
I have a 12v solar system with 2 12v batteries (One marine, other a car battery).
My inverter has a minimum voltage input of 11.0v and peak of 15.0v, but when I'm running it under load, I get a ...
- 55
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answers
39
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Charger says 5-cell li-ion battery at 17.7 volt OCV dead or deeply discharged, what could the cause be?
I have a lawnmower with two lithium-ion batteries. I charged them after sitting during the winter period. One battery charged happily to 19.15 volt open circuit voltage (OCV), whereas the other had ...
- 1,792
1
vote
2
answers
997
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Should I add an undervoltage protection for lithium battery-powered projects?
I am designing a board with a microcontroller (an ESP32) that will be in deep sleep most of the time. The board will run on a 1-cell lithium battery (not sure if I will use a Li-poly or a Li-ion).
...
- 233
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114
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Is the SkyRC B6 Nano charger suitable for charging single 18650's from 2.4v-2.6v
I have salvaged six 18650's from a laptop we've owned for years. Battery voltage: four of them are ~2.63v, two are ~2.46v
I have a SkyRC B6 Nano charger (https://www.skyrc.com/Charger/B6nano). I've ...
- 101
3
votes
0
answers
106
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Ultra low power battery
I am currently in the middle of a project and I am quite unsure of what type of battery and battery charger I should be using. To be honest I have never worked with battery or battery charger yet.
In ...
0
votes
1
answer
205
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MCP73831: VBat Voltage drop with new uncharged batteries
I made a circuit for charging a 40mah lipo battery (381018), my problem appears when a new uncharged battery is connected. The battery measures 0V at the begining, when it's conected the VBAT pin ...
- 11
0
votes
1
answer
173
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Battery level on battery indicator drops when i connect a load? [closed]
I've got this cheap battery level indicator that has 4 battery level segments, it is connected to a 12V-18AH lead acid battery that I to charge my laptop and my 1W light bulb.
I really can't seem to ...
- 69
1
vote
2
answers
6k
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Can I wake up a sleeping Li ion battery pack without dismantling it?
I have three dead lithium-ion battery packs - two of these and one of these.
My multimeter informs me that the voltage of the batteries and they both read 5.6V. I understand that by dropping below ...
- 101