12 @keyframes battery-blink {
15 50% { opacity: 0.25; }
20 -webkit-animation: battery-blink 3s linear infinite;
21 -moz-animation: battery-blink 3s linear infinite;
22 -ms-animation: battery-blink 3s linear infinite;
23 -o-animation: battery-blink 3s linear infinite;
24 animation: battery-blink 3s linear infinite;