Maximal Power DB CAS NP50 3.5V 950mAh Lithium-Ion Rechargeable Replacement Battery for Casio NB-50 Amazon.com is the only authorized dealer selling MaximalPower brand products. Please make sure your item is ONLY sold and shipped by Amazon.com! All other marketplace vendors are selling counterfeit products that do not perform the same, and/or are not covered by our MaximalPower Warranty Replacement for Casio NB-50 Lithium-Ion rechargeable battery, 3.5V , 950mAh Compatible with Exilim EX-V7 Exilim EX-V8 3 Years Limited Warranty