Smart Power PowerSmart 10.8V 4400mAh Li-ion Battery for Compaq 572831-541, 580029-001, HSTNN-Q44C, VP502AA, Compatible Original Battery Part Numbers: 	 	572831-121, 572831-541, 580029-001, 586029-001, HSTNN-IB0N, HSTNN-Q44C, PT06, VP502AA Battery Type: Li-ion ///Voltage: 10.80V ///Capacity: 4400mAh ///Color: Black//Dimension: 204.60 x 54.50 x 22.90 mm///Weight: 372.00 g Product Type: Replacement Battery (Brand New) ///Condition: New, 1 year warranty! Remarks: Please ensure the product(s) that you are going to buy fits the brand, model, part number and dimension (mentioned above) of your device. If the part number of your original battery or machine model is not listed in our description, please contact us to confirm the compatibility before biding. The brand "PowerSmart" is our exclusive registered trademark, products trademarked " PowerSmart" are marketed and sold exclusively by power198.