Portable Speaker Powered by Battery and Power Supply Separately but Can Charge the Battery From the Same Power Supply
34417
What kind of power management circuit do I need to embedded a rechargeable battery in my electronics project?
23622
Charging lead-acid batteries?
69492
How to create automatic dual battery changeover/switching circuit for uninterruptible power?
104254
USB Audio Device Loopback Through Speakers
91109
Battery chargers that can recharge disposable batteries. How do they work and are they safe?
72043
Automatic switching between external 5V and USB bus power supplies
101977
Could I replace headphones NIMH battery with Lithium Ion phone battery of the same voltage?
43676
Is it possible to power a cordless drill from wall socket adapter?
94014
Don't charge the battery but use connected power to run the phone
156300
USB data transfer with a separate power source
153381
How do I design a 2A or more power supply for my consumer USB devices?
128201
3 Contact Laptop Power Supply
54361
Best way to run power to mobile home
137542
Y USB Cable with external 5V supply
152842
How can I charge my iPhone without waking up my MacBook Pro?
137334
Using iPhone while charging and when charged
8143
Use internal speakers with others plugged into headphones jack