Questions tagged [low-battery]
The low-battery tag has no usage guidance.
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Shutdown mode in si4010 microcontroller
I'm working on a project with si4010 microcontroller plus a battery and I want to save power, so I have to enable the shutdown mode. I need to wake up every 1s and do the process and then go back to ...
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How to keep rarely-used Li-Ion batteries functional?
I have many gadgets around the house that I don't use often, recently I notice that a battery failed on an Mp3 player not used for a year. The battery now has a life of 1 minute from the original 5-7 ...
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2xAAA battery => 3.3v/250mA step-up converter with logic-driven power control [superseded]
EDIT: The requirements in the question below appear to be practically unsolvable, but happily after a bit of digging I actually found an alternative equivalent RS232 device which runs off a 3.7V Li-Po ...
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Stabilizing the UVLO feature on a DC/DC converter
Very many DC/DC controller IC's utilize an under voltage lockout feature by way of an external pin monitoring the applied voltage and comparing it with some internal reference, putting the IC into ...
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Why fully charge Lithium battery powered devices before first use?
I recently bought a Bluetooth headset and it turned out to be faulty. On getting the replacement, when I asked the customer care guy to test it after little charging, he refused to do it citing ...
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A separate MCU to cutoff LiPo on low voltage?
I'm designing a project that is going to work on a flying quadcopter. It features an ATmega328P MCU in the main 5V circuit, and is powered by a small (<500 mAh) 1-cell LiPo battery. I want to ...
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Lipo battery monitor for 1s-6s packs
I want to be able to output lipo battery voltage to a display the remaining juice in the battery much like a fuel gauge. It has to work for 1s to 6s batteries and it would be ideal to work using an ...
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What's a good estimate on how low an alkaline battery voltage can be to still make the battery useful?
Here's a YT video by Duracell about how many batteries declared dead and sent to recycling still have some usable energy. In the beginning of the video there's a sequence where they have a row of ...
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Low Battery Indicator for 2x AA Batteries
How would I create a circuit which turns on an LED when the voltage goes below 2.5V? I am using 2x AA batteries
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Garage Power is low...any way to boost?
First of all, I'm an active StackOverflow user. This is my first time on Electrical engineering, and I HOPE this is the right place to ask this.
I just moved into a new apartment. The breakerbox ...
user13734
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At what voltage is a NiMH battery empty?
I have a battery pack of NiMH batteries. It is ten cells with 1.2V, 4000mAh each, put together in series. So rated voltage is 12V. After charging, i.e. when the charging device says that it is ...
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Why do batteries recover after a load is removed?
I carry a small 2-AA flashlight, and a few times, I have accidentally left it on in my holder. Each time it dies completely, so that no light is emitted, but if I turn it back off and wait for a few ...
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how to build a low-voltage disconnect switch for DC 12.4V 70A?
How can I make a device that will make the power connected as long as the voltage of the power-supply keeps over 12.4 V (adjustable) and disconnect it if it falls below?
It also must connect the ...
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Low Battery Indicator
I'm looking to make a battery life indicator that I can use in conjunction with a micro-controller. I'm hoping that I can then read the current battery life remaining and increasingly put the micro-...
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