Скачать или смотреть DIY solar-charged Boombox made from car stereo components!

Short(ish) summary of a homemade boombox / portable stereo made from car stereo components and powered from recovered lithium 18650 cells.

Things I should add:
Yes, it goes pretty loud! I've had no issues with the power supply limiting the stereo at all, it's just about how brave you are with the volume dial...
The standard remote included with the headunit still works, it's quite useful in this application, in fact it's probably much more useful here than in a car installation.
Battery life is pretty good. I've charged it to about 20.7V (4.14V/cell), then taken it to work and run it for a full 8 hour shift using CD or Bluetooth and the voltage only dropped to about 18.7V (3.74V/cell), so the battery life is probably ~15 hours. Battery capacity is roughly 150Wh.