SPECIFICATIONS:20 L, 1500 g, 27 x 56 x 14 cmA protector backpack, specially designed to meet the needs of e-mountain biking*LITESHIELD BACK PROTECTOR offers 95% shock absorption*Separate, centered, well padded battery compartment with super safe fixation system*Charger strap fixation system*Control display compartment (fleece lined)*Including separate key ring*Fits most of the following batteries: BOSCH, YAMAHA, SHIMANO, FAZUA*Maximum battery dimensions: length: 420mm, depth: 100mm and width: 100mm