BM EN-EL19 Battery & Charger for Nikon Coolpix S3100 S3200 S3300 S3500 – Big Mike's Electronics
Amazon.com: Kastar Compatible Battery Replacement for Nikon EN-EL19, Sony NP-BJ1 and Nikon Coolpix A100 S100 S2700 S3100 S3200 S3400 S3500 S3600 S3700 S4100 S4200 S4300 S6600 S6700 S6800 S6900 S7000, Sony DSC-RX0 :
Amazon.com : Nikon COOLPIX S3100 14 MP Digital Camera with 5x NIKKOR Wide-Angle Optical Zoom Lens and 2.7-Inch LCD (Silver) : Point And Shoot Digital Cameras : Electronics