NB-6L Battery & LCD Charger for Canon PowerShot S90 S95 S120, SD770 IS, SD980 IS | eBay
Amazon.com: Kastar Battery (2-Pack) and Charger Kit for NB-6L, CB-2LY and Canon PowerShot D20, S90, S95, S120, SD980 IS, SD1300 IS, SD4000 IS, SX170 IS, SX260 HS, SX280 HS, SX510 HS, SX600
Canon S90
Amazon.com: Kastar Lithium-Ion Rechargeable Battery for Canon NB-6L, NB-6LH and PowerShot SD770 IS, SX170 IS, SX260 HS, SX280 HS, SX500 IS, SX510 HS, SX520 HS, SX530 HS, SX600 HS, SX610 HS, SX700
Canon PowerShot S90 - digital camera review: Canon PowerShot S90 - digital camera - CNET
UpStart Battery Canon PowerShot S90 Battery - Replacement for Canon NB-6L Digital Camera Battery (1000mAh, 3.7V, Lithium-Ion) - Walmart.com
Canon PowerShot S90 - digital camera review: Canon PowerShot S90 - digital camera - CNET
Amazon.com : MaximalPower Replacement Battery for Canon NB6L & Powershot S95, D10, SD1300 IS, S90 and SD1300IS Camera, 3 Year Warranty 2 Pack : Digital Camera Batteries : Electronics