Eco Clock created by designer Bor-Ru Huang has 12 slots for AA batteries. It shows the remaining level of power by LED lights. The ece factor is that it uses the very power bit of all cells.
Eco Clock by Bor-Ru Huang
Eco Clock created by designer Bor-Ru Huang has 12 slots for AA batteries. It shows the remaining level of power by LED lights. The ece factor is that it uses the very power bit of all cells.