10 - English Setup Connecting to AC power Before using your Bose Â® SoundLink Â® Mini speaker the first time, connect it to AC (mains) power and charge the battery. You can connect the power supply cord into the charging cradle, or directly into the speaker. While the battery is charging, you can begin using the speaker.
Ann is completely right. Given the alternative energy aspect of solar lights it seems a bit funny to have them charged by electrical lighting. Given enough direct and reflected sunlight in a room, they could be charged indoors. The stored charge wouldn't be as efficient as if they were in full sunlight though.
Outdoor solar lights and solar garden lights use rechargeable batteries to keep the lights lit at night. Each solar light has a solar panel that charges the rechargeable batteries by the sun during the day. Then at night when there is no sun the light turns on automatically and lights all night until dawn when the sun comes up again.