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Amazon.com : Kastar 4-Pack Battery Replacement for Pentax D-LI7 Battery, Pentax Optio 450, Optio 550, Optio 555, Optio 750, Optio 750Z, Optio MX, Optio MX4 Digital Cameras : Electronics
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Pentax Optio MX4 Digital Camera Accessory Kit includes: SDM-146 Charger, SDNP120 Battery - Walmart.com
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