Maximal Power DB PAN DMW-BLB13 Li-Ion Rechargeable Battery for Lumix G1 DMC-GF1 DMC-GH1 DMC-G1 Digital Cameras (Black) - For All Firmware Versions 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 1300 Mah li-ion battery for Panasonic DMW-BLB13 Li-Ion Rechargeable Battery for DMC-GF1 DMC-GH1 DMC-G1 Digital Cameras (For All Firmware Versions) 100% Compatible with original manufacturer equipments and chargers Maximalpower Brand is one of top selling brands for replacement batteries at amazon.com for Straight three years Backed with 1 year warranty and $1 million product liability coverage Integrated microchip prevents overcharging & lengthens battery life