Amazon.com : 2 Pack - Replacement for Sigma SD14 Battery + Charger - Compatible with Sigma BP-21 Digital Camera Battery and Charger (1600mAh 7.4V Lithium-Ion) : Electronics
Evolution of the SD14 - Sigma SD14: Quick Look at a Quirky Wonder
Amazon.com: Replacement for Sigma SD14 Battery and Charger with Car Plug and EU Adapter - Compatible with Sigma BP-21 Digital Camera Batteries and Chargers (1600mAh 7.4V Lithium-Ion) : Electronics
Bp-21 Bp-22 Battery For Sigma Sd1 Merrill Sd14 Sd15 Camera - Digital Batteries - AliExpress