threema-web/src/sass/components/_battery.scss

.battery-status {
    position: relative;
    top: -12px;
    right: 24px;

    &.with-percent {
        top: -18px;
    }

    md-icon, span {
        width: 24px;
        height: 24px;
        line-height: 24px;
        position: absolute;
    }

    .battery-percent {
        font-size: 0.8em;
        font-family: monospace;
        text-align: center;
        top: 20px;
        left: 1px;
    }
}