Best Buy: Digipower Lithium-Ion Battery for Nikon Coolpix S3100 and S4100 Digital Cameras BP-NKL19
3.7V 1.2Ah EN EL19 ENEL19 Camera Battery for Nikon Coolpix S3100 S3200 S3300 S4100 S4200 S4300 S4400 S5200 S6400 S6500|battery for nikon|camera batterybattery for camera - AliExpress
Top Brand EN-EL19 Rechargeable Lithium-ion Replacement Battery for Nikon Coolpix S3100, S3300, S4100 & S4300 Digital Cam - Walmart.com - Walmart.com
2x Pack - Nikon Coolpix S3100 Battery + Charger with Car & EU Adapters - Replacement for Nikon EN-EL19 Digital Camera Battery and Charger (700mAh, 3.7V, Lithium-Ion) - Walmart.com
Cameron Sino 700mAh Battery Compatible With NIKON Coolpix S3100, Coolpix S4100, Coolpix S2500, Coolpix S6400, Coolpix S4300 and others - Walmart.com
USB AC DC Power Adapter Camera Battery Charger + PC Cord For Nikon Coolpix S3100 | eBay