Linked Questions

4
votes
2answers
76k views

Why does this mobile phone battery have 4 terminals? [duplicate]

Why do some mobile phone batteries have 4 terminals? I want to use a mobile phone battery for my project.
2
votes
0answers
316 views

What is the usage of 3rd lead in mobile batteries [duplicate]

Possible Duplicate: Why we have 3 pins on some batteries? I'm trying to build (DIY) open charger for mobile battery. I would like to know what is the usage the middle one? Is there anyway I ...
0
votes
0answers
298 views

What is the blue wire for on my battery? (samsung galaxy note 10.1) [duplicate]

I have this battery out of a Samsung Galaxy Note 10.1 and this battery has 5 wires; 2 black, 2 red and 1 blue wire. I assume that the red wires are positive and the black wire negative charge. I've ...
18
votes
2answers
2k views

Help identify the discrete component in this battery pack

I am rebuilding a NiMH battery pack for a RF remote control device which can be recharged by plugging the device in. The battery pack is connected with three wires: black to the negative red to the ...
5
votes
4answers
20k views

Shelf life of a lithium polymer battery

I am trying to determine the shelf life of a typical Li-Polymer battery. I have Googled but can't find any definitive view on the matter. There are two questions regarding the battery shown: 1. What ...
6
votes
2answers
553 views

Fake a panasonic battery to revive camera to copy photos from internal memory

Got this camera from a friend, battery door broken, no cables, no battery. There are some important photo's on this camera that I want to copy from internal memory to SD card. We first want to try ...
0
votes
2answers
1k views

GoPro Hero 2 Battery Elliminator? (3.7v versus 5v)

I have an old GoPro Hero 2 who's external USB plug has failed, and I have no way of powering it externally. I need to run this GoPro using an external wired power source (available over a 5v USB). ...
1
vote
4answers
414 views

Do cells phones put out a signal when charged through data out?

Do cells phones put out a signal when fully charged through data out? I am wondering this because there is a competition to see who can build the best and most efficient portable cell phone battery ...
-1
votes
2answers
526 views

Charging a smart phone battery

I want to make a simple battery powered development board for my AVR's but the problem is that the regular 3.7v batteries or very big in size, so I decided to use a smartphone battery from one of my ...
0
votes
2answers
213 views

Using Arduino to power a 4 terminal phone [closed]

My dad took my battery for misbehaving (No questions!) but I still want to use my phone (Huawei Honor 3c). However, when I use a USB plug, the phone only vibrates constantly (Why does it do this?). ...
-1
votes
1answer
76 views

A few (noob) questions about this IC [IDT ZSPM4521]

It's my first time designing a PCB and my first time posting to this website (so yeah, I'll be a bit of a mess). I've got a few questions regarding the pins labeled VTHERM and VTH_REF, a thermistor ...