The Velotric Original Spare Battery is built with premium lithium-ion cells, designed for long range and reliable safety. Whether you’re replacing an old battery or keeping a spare fully charged and ready, it lets you enjoy twice the freedom of riding with ease.Features 48V, 16.7Ah (801.6Wh), IPX7, Certificated by UL 2271 Designed for Velotric ebikes: Compatible with Discover 3. Premium lithium-ion cells: Stable, safe, and long-lasting performance. Factory-matched fit: Seamlessly integrates with your bike’s electrical system for easy installation. Important Notes System update required: To unlock extended range performance, your Nomad 2/2X controller software must be upgraded to latest version. Charger not included: Please purchase separately if needed. Battery cover not included: Available separately with Velotric’s original protective cover to safeguard your battery and enhance your bike’s style. Final Sale, Non-Returnable: All battery purchases are final and cannot be returned or refunded. Details:- Discover 1 Plus, Nomad 1 Plus, Packer 1 & Go 1 BatteryWeight: 8.7 lb (3.95 kg);Capacity: 692 Wh;Fold Series Battery608Wh, 18650 cell, Certificated by UL 2271Discover 2 & Summit 1 Battery705.6Wh, Samsung/LG cells, Certificated by UL 2271Fold Series Long-range BatteryCapacity: 783.9Wh 18650 Cell Certificated by UL 2271Nomad 2 Battery705.6Wh, Samsung/LG cells, Certificated by UL 2271Nomad 2X Battery801.6Wh, Samsung/LG cells, Certificated by UL 2271Breeze 1 Battery627Wh, 18650 cells, Certificated by UL 2271Fold Series batteries have a built-in keyhole and comes with a key.Other series batteries does not come with key, as the keyhole is on the bike frame.To purchase a key for your bikes, Please click here: Submit contact formDiscover 2 CoverMain material: Aluminum AlloySize: 480mm×125mm×47mmSummit 1 CoverMain material: PlasticsSize: 480mm×125mm×47mmNomad 2 CoverMain material: PlasticsSize: 480mm×125mm×47mm