Nikon Coolpix S4000 Battery and Charger - Replacement for Nikon EN-EL10 Digital Camera Batteries and Chargers (800mAh, 3.7V, Lithium-Ion) - Walmart.com
Gomadic Portable External Battery Charging Kit suitable for the Nikon Coolpix S4000 Includes Wall; Car and USB Charge Options
Kastar Wall Charger Battery for Nikon EN-EL10 MH-63 & Nikon Coolpix S4000 Camera | eBay
Promaster ProMaster EN-EL10 Battery - Nikon Coolpix S3000, S4000, S80, S5100 - ASAP Photo and Video
Nikon Coolpix S4000 Battery and Charger - Replacement for Nikon EN-EL10 Digital Camera Batteries and Chargers (800mAh, 3.7V, Lithium-Ion) - Walmart.com
Henjoy® En-EL10 USB Battery Charger for Nikon Coolpix S200, S203, S210, S220, S230, S3000, S4000, S500, S510, S5100, S520, S570 and More, for Mh-63 - China Digital Camcorder Battery and Digital Camera