Caros amigos brasileiros, seja bem-vindo! Os produtos em nossa loja são econômicos e de boa qualidade. Você pode nos consultar diretamente com qualquer dúvida. A resposta do nosso serviço ao cliente é rápida e profissional. O link da nossa loja é: https://lista.mercadolivre.com.br/_CustId_1646009146?item_id=MLB4705025214&category_id=MLB46290&seller_id=1646009146&cli ent=recoview-selleritems&recos_listing=true#origin=vip&component=sellerData&typeSeller=classic1.Function: Digital display with power, detachable, no welding, with anti-reverse connection protection, can charge 12 18650 flat head batteries, when the built-in battery can be used as a power bank, the ordinary version requires a charging cable, wireless fast charging The version does not require a charging cable and can be fast. 2. DIY mobile power kit, self-configured mobile power, larger battery capacity and longer lasting can better solve your charging problem.3.Suitable for people with higher charging needs, equipped with 3 kinds of charging interfaces, for, for Type-C can charge the charging box. 4. Thanks to the power display, you can know the remaining power anytime, anywhere, and better charge your mobile phone or other devices.5. Comes with a lanyard, which is more convenient to carry, allowing you to carry it wherever you go.Model: T12 series with lightBattery: 18650 flat head battery * 12 (free welding)Size: 43mm thick, 80mm wide, 153mm long(internal dimensions removing one spring: 38mm wide, 72mm long, 110mm)Parameter:T12 with light: output/input, maximum power: 5V-2.1A. Precautions: 1. The battery cannot be used if its outer casing is damaged.2. Pointed batteries cannot be used, only flat batteries.3. The positive and negative poles must be placed and used correctly.4. Do not use or store in a high temperature environment.Color: blackMaterial: ABS Package Contents:1 x 18650 Battery Case (Batteries not included) Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.