If you’ve got dreams of you and the great open road, then double up on your juice! The PakYak E+ is capable of carrying an extra 500Wh battery so you can extend the ride range without stopping and charging. Note: The PakYak auxiliary battery is designed to be installed in the storage box only. DO NOT use the PakYak auxiliary battery in the main battery location (Downtube) neither in any other bicycle. Features 500WH auxiliary battery Pre-wired auxiliary battery holder (SOLD SEPARETALY, PLEASE CONTACT YOUR GIANT AUTHORIZED DEALER) Specifications Battery Material: aluminum Weight: 6.85lbs/3110g Dimension: 15.7" x 2.8" x 2.8"/40 cm x 7 cm x 7 cm Content: 500Wh Holder platform Material: aluminum Weight: 1.28lbs/580g Dimension: 5.1" x 3.2" x 17.7"/13cm x 8cm x 45cm