The Nintendo DS contains a rechargeable lithium-ion battery with a capacity of 850 mAh. On a full four-hour charge, Nintendo claims the battery lasts a maximum of 10 hours under ideal conditions. Battery life is affected by multiple factors including speaker volume, use of one or both screens, back lighting, and use of wireless connectivity. The biggest effect on battery life is caused by using the backlight, which can be turned off in the main menu screen, or in selected games (such as Super Mario 64 DS). The battery is user-replaceable using only a phillips head screwdriver. After about 500 charges the battery life starts dropping.
To sustain battery life in the midst of a game, users can close the Nintendo DS system, putting the DS in 'sleep' mode that also pauses the game that is being played; however, closing the system while playing a Game Boy Advance game will not put the Nintendo DS into sleep mode; the game will continue to run normally, including the back light. Certain DS games (such as Animal Crossing: Wild World) also will not pause but the backlight, screens, and speakers will turn off. When saving the game in Pokémon Diamond and Pearl, Zoo Tycoon DS, SimCity DS, Tiger Woods PGA Tour,Digimon World Dawn, Mega Man Battle Network 5, or The Legendary Starfy, the DS will not go into sleep mode.
The Nintendo Wi-Fi Connection is a free online game service run by Nintendo. Players with a compatible Nintendo DS game can connect to the service via a Wi-Fi network using a Nintendo Wi-Fi USB Connector or a wireless router. The service was launched in North America on November 14, 2005 with the release of Mario Kart DS. Various online games and a web browser are now available.
With Download Play it is possible for users to play multiplayer games with other Nintendo DS systems using only one game card. Players must have their systems within wireless range (up to approximately 65 feet) of each other and the guest system to download the necessary data from the host system.
Some Nintendo DS retailers feature DS Download Stations that allow users to download demos of upcoming and currently available DS games; however, due to memory limitations, the downloads are erased once the system is powered off. The Download Station is made up of 1 to 8 standard retail DS units, with a standard DS card containing the demo data. On May 7, 2008, Nintendo released the Nintendo Channel for download on the Wii. The Nintendo Channel uses Nintendo's WiiConnect24 to download Nintendo DS demos through the Nintendo Channel. From there, a user can select the game demo he/she wishes to play and, similar to the Nintendo DS Download Stations at retail outlets, download the demo (until the user turns off the console) to their DS' 4MB RAM.
In collaboration with fast food restaurant chain McDonald's, a service called "Nintendo Zone" will start in the Kanto, Ch?ky? and Kansai regions of Japan. It is an extension of the DS Download Station that offers exclusive content to each area and demos of upcoming and currently available DS games. The DSi has the necessary software built-in to detect and use these zones, while previous versions require downloading the "Nintendo Zone Viewer."