Ключевые слова: app, application, battery, button, cell, cellphone, charge, charger, clock, concept, control, countdown, design, device, digital, display, electric, electricity, electronic, energy, flat, gadget, hand, icon, illustration, management, mobil, off, online, phone, plug, power, recharge, red, screen, shape, shuts down, sign, smart, smartphone, start, switch, symbol, technology, time, timer, touch, turn, turn off,