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Questions tagged [battery]

A battery is a portable electrical power source which is often used in mobile devices.

An electric battery is a device consisting of one or more electrochemical cells that convert stored chemical energy into electrical energy.

Each cell contains a positive terminal, or cathode, and a negative terminal, or anode. Electrolytes allow ions to move between the electrodes and terminals, which allows current to flow out of the battery to perform work.

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Battery status of an external device on HTML5

I have a PIC18 that sends its Vcc level of battery charge on a mysql database. I was wondering if there is a script to display its battery-status on my website homepage. I mean something like a typical mobile battery icon to display over my website…
Penny Wiz
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android: service behaved differnat when not connected to pc

I believe it's because of some power saving option or whatever but I cant debug it since it only fails when it's on battery I have a service that checks on a webpage every 60 seconds I use an asyncTask in the service to do this and I make it…
Mars
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powering arduino and servo with a single battery

I have been struggling to power up a servo and arduino at the same time. Is it possible to connect a 3.7v 2200mah battery using a step up voltage regulator and then connect the servo and arduino in parallel? I also want to charge the battery, that's…
Nico Rojas
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How to judge if the phone is low battery when i enter app more timely

I want to do something when enter app with low battery.I know i can register abroadcastReceiver to get the battery level,but it is not timely.How can i get the battery level more timely?
Ann
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Mobile battery of one mobile for another

Can i connect mobile battery of one smart phone for another. I'll use all 3 pin connections. Is there any risk involved? I'm facing some problem with my mobile battery and phone switches off all of a sudden. I'm using huawei ascend P1.
Javeed
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Android: Default Battery Percentage Level for individual services to switch off

We all know Android OS switches off services one by one when the battery reaches critical level. But is there any fixed battery level to cut down individual services. For example, Bluetooth will be switched off at 20%, Mobile data at 15%, Wifi at…
Karthik Andhamil
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android development modularity in services

I am developing a mobile application that has to monitor several behaviours a user might do. One of the issues i have is low battery performance. I was wondering, is it best to have a modular architecture and several services each with its own…
JoaoFilipeClementeMartins
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Why my application shows in battery after exit android application?

Screens Problems 1) It drains lots of battery. 2) After Exit application it display in battery status.
Darshak
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iOS CoreLocation: Turn it off after position was found or let it run

I build a gps tracker which takes the current position every 20 seconds or if the device rotates more than xx °. Now I'm not sure what's the best solution for saving battery energy: 1) Stop CoreLocation service after I got a position and turn it on…
user2181824
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Calculate battery life on iOS

Possible Duplicate: iphone: Calculating battery life I would like to know if its possible to calculate the battery lifetime on iOS. So, for how much time I can use my device until it is 0% of battery percentage. Thank you all! :)
Giuliano Zanco
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Battery info from the Blackberry 10 SDK

I tried this code: battery_info_t **pointer=NULL; battery_get_info(pointer); return battery_info_get_time_to_empty(*pointer); // needs simple pointer (*pointer) My question is: how can i convert **pointer to *pointer
rosu alin
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Battery Model Charge VS Discharge Time Constant T - what about relaxation constant?

I am somewhat familiar with battery modelling using thevenin equivalent models which use R to represent the batteries internal resistance and RC to represent the time constant for charge and discharge. I have also seen models which use a different…
user9067266
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How do I put a warning/message on a specific number of a counter?

I am using a system in my website that identify the amount of battery the user have in his phone, the system is "battery-api". I would like to insert a warning when the battery is over 10% (for example) like, "Hey, you need to charge your phone, you…
Paulo Lima
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Find battery temperature using Arduino Uno or Feather M0

I want to run my project using battery. I am using Adafruit Feather M0 Bluefruit LE. I want to know can I face any issue with battery temperature and how can I keep a trace on the battery temperature. If somebody knows how to solve this problem if I…
MANU JAIN
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how do I get instantaneous battery levels? (Android)

I am trying to sample accurate battery levels in my application but I'm really struggling. Currently I have: String s = String.valueOf(BATTERY_PROPERTY_CURRENT_NOW); batteryShow.setText(s); but just returns 2 on different devices and different…
user9027744
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