https://www.youtube.com/watch?v=3TYXS7BKecI
La Raspberry Pi 2 It has been on the market for a few weeks now, with sales that have been more than interesting due to the good reception it has had among users. Despite the improvements of this device compared to previous versions, the problem is that it does not work unless we have it connected at all times. This may seem like something without too much importance at times limits very much the things that can be done with it, and above all it puts the brake on some interesting projects.
Now it seems that this problem could be solved thanks to PiJuice, a battery system that would supply energy to our RaspBerry and that will allow us to use it away from a power outlet.
The capacity of this battery system is 1.400 mAh and they are compatible with a HAT for the Raspberry Pi. When this mini computer is connected these batteries are charged, as it happens with any laptop or mobile device, and once the power is disconnected from the Raspberry, the batteries begin to do their work.
At the moment, this battery system offers power for the Raspberry Pi for 6 or 8 hours, although the developer is already working on batteries of much larger size that allow it to be used for more hours or even days.
Su price is 30 euros, 91 dollars in the case of the solar charging version. These days Kickstarter is looking for financing, but it has undoubtedly convinced users and it is that it has already managed to triple the money that it had originally set as a goal.
How about PiJuice to give autonomy and portability to your Raspberry Pi?.
More information - kickstarter.com
The duration estimates are a bit ... by eye xDDD
Alex Eames (Raspi.tv) does good consumption analysis with each raspi that comes out, and with 2 he made it clear
http://raspi.tv/2015/raspberry-pi2-power-and-performance-measurement
With the consumptions in mA ( http://raspi.tv/wp-content/uploads/2015/02/Pi2-power-table-1024×338.png ) You see that a raspi 2 working could last 5 hours, but an A + would go away at 10 and more: p
That is counting that the HAT boosts have an efficiency of 100, which they will not. A buck-booster can have an efficiency of 90-95%, so well, nothing happens if we ignore that a bit: p
Good HAT, although I see quite expensive in the solar case (I understand it, photovoltaic cells are not cheap ...) but for a minipc of 35 € ... xD)