1. Introducció
This user manual provides detailed instructions for the safe and efficient operation of your ROMOSS LT20 Pro 20000mAh Power Bank. Please read this manual thoroughly before using the product and retain it for future reference.
2. Producte acabatview
The ROMOSS LT20 Pro is a high-capacity 20000mAh portable power bank designed for charging various electronic devices. It features 18W Quick Charge, USB-C Power Delivery (PD), and multiple input/output ports for versatile charging.
2.1 Característiques clau
- 20000 mAh d'alta capacitat: Proporciona múltiples càrregues per a telèfons intel·ligents i altres dispositius.
- 18W Quick Charge & USB-C PD: Enables rapid charging for compatible devices and faster recharging of the power bank itself.
- 3 ports d'entrada: Micro-USB, Lightning, and USB Type-C for convenient recharging using a single cable.
- 3 Ports de sortida: Permet la càrrega simultània de fins a tres dispositius.
- Pantalla digital intel·ligent: Mostra el percentatge de bateriatage, càrrega voltage, and charging current for precise monitoring.
- Sistema de seguretat avançat: Built-in protections against over-heat, over-charge, over-current, over-discharge, and short-circuit.
2.2 Components del producte

Figure 2.1: ROMOSS LT20 Pro Portable Charger (Front View)
Aquesta imatge mostra el principal view of the ROMOSS LT20 Pro portable charger, highlighting its sleek design and digital display.

Figure 2.2: Input and Output Ports
This image illustrates the various input (Micro-USB, Lightning, Type-C) and output (USB-A, Type-C) ports available on the power bank, indicating their respective voltage i capacitats actuals.
3. Configuració
3.1 Càrrega inicial del banc d'energia extern
Before first use, fully charge your ROMOSS LT20 Pro power bank. Connect a compatible charging cable (Micro-USB, Lightning, or USB Type-C) to one of the input ports on the power bank and the other end to a power adapter (not included). The digital display will show the charging progress.
A full recharge from 0% to 100% typically takes approximately 7.5 hours with an 18W wall charger.

Figura 3.1: Recàrrega del banc d'energia extern
This image demonstrates the power bank being recharged via its USB-C port, indicating the time required for a full charge with an 18W wall charger.
3.2 Connexió de dispositius
To charge your device, connect a compatible USB charging cable from your device to one of the output ports on the power bank. The power bank will automatically begin charging your device.
4. Instruccions de funcionament
4.1 Càrrega dels vostres dispositius
- Assegureu-vos que el banc d'energia estigui prou carregat.
- Connect your device's charging cable to one of the power bank's output ports (USB-A or USB Type-C).
- Connecteu l’altre extrem del cable al dispositiu.
- El banc d'energia detectarà automàticament el dispositiu i començarà a carregar-se. La pantalla digital mostrarà l'estat de càrrega.
The LT20 Pro can charge an iPhone 8 approximately 7.7 times, a HUAWEI P10 about 4.4 times, and a Nintendo Switch. It supports simultaneous charging of up to 3 devices.

Figure 4.1: Simultaneous Device Charging
This image shows the ROMOSS LT20 Pro power bank simultaneously charging three different smartphones, demonstrating its multi-device charging capability.

Figure 4.2: Charging Capacity Examples
This image visually represents the approximate number of charges the 20000mAh power bank can provide for various devices, including iPhone 8, HUAWEI P10, OPPO R11, and VIVO X9.
4.2 Comprensió de la pantalla digital
The upgraded LED digital indicator provides real-time information. Press the power button alternatively during use to cycle through the display modes:
- Bateria Percentage: Shows the remaining power level (e.g., "84%").
- Vol. De càrregatage (V): Mostra el volum de càrrega actualtage.
- Corrent de càrrega (A): Mostra la càrrega actual amperage.
When a Quick Charge-enabled device is connected, a blue sign will indicate Fast Charge mode.

Figure 4.3: Smart Digital Display
This image showcases the power bank's smart digital display, illustrating how it presents battery percentage, càrrega voltage, i corrent de càrrega.
4.3 Vídeo oficial del producte
Video 4.1: ROMOSS LT20 Pro Portable Charger Overview
Aquest vídeo ofereix una visió generalview of the ROMOSS LT20 Pro portable charger, demonstrating its features, charging capabilities, and digital display in action.
5. Manteniment
- Mantingueu el banc d'energia allunyat de temperatures extremes, la llum solar directa i els líquids.
- Emmagatzemar en un lloc fresc i sec quan no s'utilitzi.
- Netegeu la superfície amb un drap suau i sec. No utilitzeu productes químics agressius ni materials abrasius.
- To prolong battery life, fully charge the power bank at least once every three months if not used regularly.
- Eviteu deixar caure o sotmetre el banc d'energia a forts impactes.
6. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| El banc d'energia no es carrega | Charging cable is faulty or not properly connected. Power adapter is not sufficient. | Check cable connections. Try a different charging cable or power adapter. Ensure the adapter meets the power bank's input requirements. |
| El dispositiu no es carrega des del banc d'energia | Power bank battery is depleted. Device charging cable is faulty. Device is not compatible. | Torna a carregar el banc d'energia. Prova un cable de càrrega diferent. Assegura't que el dispositiu sigui compatible amb la càrrega USB. |
| La pantalla digital no funciona | Power button not pressed. Internal malfunction. | Premeu el botó d'engegada per activar la pantalla. Si el problema persisteix, poseu-vos en contacte amb l'atenció al client. |
| Càrrega lenta | Cable or adapter not supporting fast charge. Device not supporting fast charge. | Use a fast-charging compatible cable and adapter. Ensure your device supports fast charging. |
7. Especificacions
| Característica | Detall |
|---|---|
| Número de model | PLT20 |
| Capacitat de la bateria | 20000 mAh |
| Dimensions del producte | 6.6 x 3.2 x 0.9 polzades |
| Pes de l'article | 1.04 lliures |
| Ports d'entrada | Micro USB, Lightning, USB Type-C |
| Ports de sortida | USB Type-C, USB-A (2 ports) |
| Característiques especials | Fast Charging, Portable, Digital Display |
| Color | Or |
| Tipus de bateria | Polímer de liti |
8. Garantia i Suport
Your ROMOSS LT20 Pro Power Bank comes with a worry-free 12-month warranty from the date of purchase. This warranty covers manufacturing defects and issues arising from normal use.
For technical support, warranty claims, or any product-related inquiries, please contact ROMOSS customer service through the retailer's platform or the official ROMOSS website. Please have your purchase receipt and product model number ready when contacting support.





