New Multi Calculator

[Dani R.]

(10-30-2017 09:24 AM)teenix Wrote:  ...
The board can be powered by 3AAA cells, or directly from the USB port of a PC.
...

Has ever somebody tried to power a LED calculator with a cell phone battery like a BL-5B, combined with a possibility to be charged over USB? So it should be possible to build a quite small package. Or are the current to high for a cell phone battery.

Dani