1. Overview
The Nastima DC 12V Mobile Battery is a versatile power solution designed for a wide range of devices. With its 56.16Wh high capacity and PD45W fast charging capabilities, it can power smartphones, laptops, and specialized 12V equipment such as air-conditioned workwear fans, LED lighting strips, and heated vests. This manual provides essential information for safe and efficient use of your mobile battery.
2. Product Features
- DC12V Output: Equipped with a DC12V output function, expanding compatibility beyond standard mobile batteries to devices like air-conditioned workwear fans, LED lighting, cameras, heated vests, and surveillance cameras.
- High Capacity: Features a 10.8V 5200mAh (56.16Wh) lithium-ion battery, offering substantial power for extended use. The true energy capacity is measured in Watt-hours (Wh), providing a more accurate comparison than milliampere-hours (mAh) alone.
- PD45W Fast Charging: The Type-C port supports Power Delivery (PD) with a maximum output of 45W, enabling fast charging for most laptops and other compatible devices. Includes DC5521 to 5521 and DC5521 to 5525 conversion cables for broad 12V device compatibility.
- 6-Layer BMS Safety Protection: An advanced Battery Management System (BMS) provides comprehensive protection against overcharge, over-discharge, short circuit, overcurrent, and overheating, ensuring safe operation and extending battery lifespan.
- Quality Assurance: Undergoes strict electrochemical tests and appearance inspections. Backed by a 1-year manufacturer's warranty for reliable support.
3. Package Contents
Please check that all items listed below are included in your package:
- Nastima DC 12V Mobile Battery (PS12-LI52-NAPD)
- DC5521 to DC5521 Conversion Cable
- DC5521 to DC5525 Conversion Cable
- User Manual

Image: Contents of the Nastima DC 12V Mobile Battery package.
4. Product Layout and Ports
Familiarize yourself with the layout of your Nastima mobile battery:

Image: Front view of the mobile battery with labeled ports and indicators.
- Type-C (IN/OUT) Port: Supports Power Delivery (PD) up to 45W for both input (charging the power bank) and output (charging devices).
- USB-A (OUT) Port: Provides Quick Charge 3.0 (QC3.0) output up to 22.5W for compatible devices.
- DC 12V (OUT) Port: A DC5521 port providing 12V 2A output for specialized 12V devices.
- ON/OFF Switch: Press to power on or off the device.
- Battery Capacity Indicator Lights: Four LED lights indicate the remaining battery charge level.
5. Setup
5.1 Initial Charging
Before first use, fully charge your Nastima mobile battery. Connect a compatible USB-C PD charger (not included) to the Type-C IN/OUT port. The battery indicator lights will illuminate to show charging progress. A full charge typically takes approximately 3 hours with a PD45W charger.
6. Operating Instructions
6.1 Powering On/Off
Press and hold the ON/OFF switch for a few seconds to power on or power off the mobile battery. The battery indicator lights will show the current charge level when powered on.
6.2 Charging Devices
Connect your device to the appropriate output port:
- For Smartphones, Tablets, and Laptops: Use a USB-C to USB-C cable to connect to the Type-C IN/OUT port for PD45W fast charging. For devices supporting QC3.0, use a compatible cable with the USB-A OUT port.
- For 12V Devices (e.g., Air-Conditioned Workwear, Heated Vests, LED Strips): Use the provided DC conversion cables to connect your 12V device to the DC 12V OUT port. Ensure the DC plug size matches your device (DC5521 or DC5525).

Image: The mobile battery powering a variety of electronic devices.
7. Safety Features (BMS)
Your Nastima mobile battery is equipped with an advanced Battery Management System (BMS) that provides multiple layers of protection to ensure safe operation and prolong battery life:
- Overcharge Protection: Prevents the battery from being charged beyond its maximum capacity.
- Over-discharge Protection: Protects the battery from being discharged below its safe minimum voltage.
- Short Circuit Protection: Automatically cuts off power in case of a short circuit.
- Overcurrent Protection: Safeguards against excessive current flow.
- Overheat Protection: Monitors internal temperature and prevents overheating.

Image: Internal view highlighting the BMS and its protection features.
8. Maintenance
To ensure the longevity and optimal performance of your mobile battery, follow these maintenance guidelines:
- Storage: Store the battery in a cool, dry place away from direct sunlight and extreme temperatures. For long-term storage, charge the battery to about 50-70% capacity.
- Cleaning: Use a soft, dry cloth to clean the exterior of the battery. Do not use harsh chemicals or abrasive materials.
- Avoid Drops and Impacts: Protect the battery from physical shock, which can damage internal components.
- Regular Use: If not used for extended periods, it is recommended to fully charge and discharge the battery at least once every three months to maintain battery health.
9. Troubleshooting
If you encounter issues with your Nastima mobile battery, refer to the following common problems and solutions:
- Battery Not Charging:
- Ensure the charging cable and adapter are securely connected and functioning correctly.
- Verify that the charging adapter meets the required specifications (e.g., USB-C PD compatible).
- Device Not Charging from Battery:
- Confirm the mobile battery is powered on.
- Check if the connecting cable is compatible with your device and the battery's output port.
- Ensure the device being charged is compatible with the output voltage/current of the battery.
- If charging a laptop via PD, ensure the laptop supports PD charging via its USB-C port.
- Battery Indicator Lights Not Working:
- Try powering the battery off and on again.
- If the battery is completely depleted, the lights may not show until a small charge is accumulated.
- Slow Charging:
- Ensure you are using a fast-charging compatible cable and adapter for both input and output.
- Some devices may limit charging speed based on their battery status or temperature.
If these steps do not resolve the issue, please contact customer support.
10. Specifications
| Feature | Specification |
|---|---|
| Brand | NASTIMA |
| Model Number | PS12-LI52-NAPD |
| UPC | 762765532263 |
| Battery Type | Lithium-Ion |
| Capacity | 10.8V 5200mAh (56.16Wh) |
| Voltage | 12 Volts |
| Type-C (IN/OUT) | PD45W Max |
| USB-A (OUT) | QC3.0 22.5W Max |
| DC 12V (OUT) | 12V 2A (DC5521) |
| Port Count | 3 (1x Type-C, 1x USB-A, 1x DC) |
| Fast Charging Time | Approx. 3 hours (with PD45W charger) |
| Product Dimensions | 16.2L x 8W x 2.3H cm |
| Compatible Devices | Camera, Smartphone, Laptop, 12V devices |
| Country of Origin | China |

Image: Physical dimensions and weight of the mobile battery.
11. Warranty and Support
11.1 Manufacturer's Warranty
This Nastima mobile battery comes with a 1-year manufacturer's warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. It does not cover damage caused by misuse, accidents, unauthorized modifications, or natural wear and tear.
11.2 Customer Support
For any questions, technical assistance, or warranty claims, please contact Nastima customer support through the retailer where you purchased the product or visit the official Nastima website for contact information. Please have your model number (PS12-LI52-NAPD) and proof of purchase ready when contacting support.