This listing is for a TRANSNOVO SnapCharge - Magnetic Charger for RayBan Meta Smart Glasses - Model number RB2-B. This is brand new, and comes with a charger and two battery packs, allowing for up to 24 hours of usage without recharging. The compact case, which is also the charging stand, will fit easily into a pocket for travel and quick change once the first battery is low. The weight of the battery is less than an ounce, so it is barely noticeable when wearing it.