Joyroom JR-L004 12W 10000mAh Jelly Series Power Bank

The Joyroom JR-L004 Power Bank combines 10000mAh battery capacity with 12W charging power in a portable 225-gram design. This Jelly Series model features Type-C input supporting 5V/3A, 9V/2A, and 12V/1.5A for fast recharge, plus USB-A and Type-C cable outputs delivering 5V/2.4A each. The 90×81.3×27.5mm body fits easily in bags and pockets for daily commutes across Dhaka or travel between cities.

Battery Capacity and Charging Performance – Joyroom JR-L004 Power Bank

The 10000mAh (3.7V, 37Wh) lithium polymer cell provides a rated output of 6000mAh at 5V/2.4A. This capacity charges most smartphones 2 to 3 full cycles depending on phone battery size. A typical 4000mAh phone receives approximately 2.5 charges before the power bank needs recharging. The 12W maximum output maintains steady charging speed for Android devices and accessories without overheating.

Type-C Input and Dual Output Ports – Joyroom JR-L004 Power Bank

The Type-C input port accepts three voltage levels: 5V at 3A (15W), 9V at 2A (18W), and 12V at 1.5A (18W). A compatible 18W adapter fully recharges the JR-L004 in approximately 3.5 to 4 hours. The power bank supplies power through one USB-A port and one integrated Type-C cable, both capped at 5V/2.4A. You can charge two devices simultaneously, sharing the total 12W output between them.

• Battery: 10000mAh, 3.7V (37Wh) lithium polymer
• Rated capacity: 6000mAh at 5V/2.4A
• Type-C input: 5V/3A, 9V/2A, 12V/1.5A
• USB-A output: 5V/2.4A maximum
• Type-C cable output: 5V/2.4A maximum
• Dimensions: 90×81.3×27.5mm
• Weight: 225 grams
• Material: PC + fireproof ABS

Compact Build and Fireproof Material

Constructed from polycarbonate and fireproof ABS plastic, the JR-L004 resists heat buildup during charging cycles. The 90mm width and 27.5mm thickness create a slim profile that slides into trouser pockets or small handbags without bulk. At 225 grams, the weight stays lighter than most 10000mAh models on the Bangladesh market, which often exceed 250 grams. The smooth jelly-finish surface resists scratches and provides grip during handling.

Safety Features and Protection Circuits

Built-in circuits protect against overcharge, over-discharge, overcurrent, and short circuit conditions. The power bank automatically stops charging your device at 100 percent battery to prevent cell degradation. Temperature sensors shut down output if internal heat exceeds safe operating limits. These protections extend the lifespan of both the power bank and connected devices, critical for humid climates and extended use in Bangladesh.

Who Should Buy the Joyroom JR-L004

This power bank suits students, office workers, and frequent travelers who need reliable backup power without carrying heavy chargers. The 10000mAh capacity handles a full workday of phone use plus emergency top-ups for earbuds or smartwatches. Commuters on Dhaka metro or long-haul buses between Chittagong and Sylhet benefit from the dual charging ports, allowing simultaneous phone and accessory charging. The 225-gram weight and slim 27.5mm thickness make it practical for daily pocket carry, while the fireproof ABS construction provides durability for rough handling in crowded transport.

Buy the Joyroom JR-L004 Power Bank in Bangladesh from Hello Tech BD

Frequently Asked Questions

What is the price of the Joyroom JR-L004 Power Bank in Bangladesh?

The latest price of the Joyroom JR-L004 Power Bank in Bangladesh is shown at the top of this page at Hello Tech BD. Prices can change with stock and import cost, so the price on this page is always the current one.

How long does delivery of the Joyroom JR-L004 Power Bank take?

Orders are usually delivered in 1-5 working days inside Bangladesh.

Can I return the Joyroom JR-L004 Power Bank if there is a problem?

Yes. You can request a return within 7 days of delivery if the product arrives damaged or does not match this page. Keep the box and accessories with the product.

How many times can the Joyroom JR-L004 charge a smartphone?

The JR-L004 delivers a rated capacity of 6000mAh at 5V/2.4A output. For a typical 4000mAh smartphone, this provides approximately 2 to 3 full charges depending on cable quality and phone battery health. Smaller 3000mAh phones receive closer to 3 full cycles, while larger 5000mAh devices get around 1.5 charges.

What adapter do I need to fast charge the JR-L004 power bank?

Use a USB Type-C charger that supports 9V/2A or 12V/1.5A output for fastest recharge. An 18W PD adapter or QC 3.0 adapter will fully charge the power bank in approximately 3.5 to 4 hours. Standard 5V/2A adapters work but extend charging time to around 6 hours.

Can I charge two devices at the same time with this power bank?

Yes, the JR-L004 has one USB-A output port and one integrated Type-C cable output, both rated at 5V/2.4A. When charging two devices simultaneously, the total 12W output is shared between the ports. Each device receives roughly 6W, which is sufficient for standard smartphone charging but slower than using a single port.

What safety protections does the Joyroom JR-L004 include?

The power bank includes overcharge protection, over-discharge protection, overcurrent protection, short circuit protection, and temperature monitoring. The PC and fireproof ABS casing resists heat damage, and internal circuits automatically stop charging when your device reaches 100 percent to prevent battery degradation.

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For independent background reading about the Joyroom JR-L004 Power Bank and similar products, see applegadgetsbd.com.

Another useful reference: gearswheel.com.