Amazon.com : Synergy Digital Camera Battery, Works with Canon Powershot G9 Digital Camera, (li-ion, 7.4V, 900 mAh) Ultra Hi-Capacity, Compatible with Canon NB-2L Battery : Electronics
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2x Pack - Canon PowerShot G9 Battery + Charger - Replacement for Canon NB-2LH Digital Camera Battery and Charger (1800mAh, 7.4V, Lithium-Ion) - Walmart.com