Use this as a replacement battery or pack it along as a spare to go twice the distance. This high-performance 532 watt hour lithium battery with integrated GPS receiver is waterproof to IP67 standards and works with the Travel 503 or 1003 electric outboard. It packs light at 9.9lb. and comes with a USB port to power other devices. Compatible with 90W charger (sold separately).Features:Works with Torqeedo Travel 503 and 1003High-performance lithium batteryIntegrated GPS receiverCompletely waterproof (IP 67)Capable of being charged by solar energy using Torqeedo Solar ChargerLightweightIncludes USB port to be able to power other devicesCompatible with 90W charger (sold separately)Two year manufacturer warrantySpecifications:Watt Hours: 532.8WhVoltage: 29.6VAmp Hours: 18AhWeight: 9.9lb.