Panasonic HC-X920 3MOS Camcorder Battery Lithium-Ion 3900mAh - Replacement for Panasonic VW-VBN390 Battery Replacement battery for the Panasonic VW-VBN390, Lithium-Ion (Li-ion) 7.4V (3900mAh) This Synergy Digital battery is fully compatible with the original Panasonic VW-VBN390 Battery. You can rest assured that this battery will work with your Panasonic Camera/Camcorders that use VW-VBN390 and it can be charged with the original manufacturers charger. We use only high quality Japanese cells, so you are sure this battery will last for years to come. Synergy Digital is a very high reputable company that manufactures batteries and other electronic accessories for over 2 decades, all our products come with a 3 year manufacturer warranty.