Why is the charging time increased when I used the foldable solar charger behind windows?

Some windows might have been tinted with solar film that black infrared/UV light. This will reduce the solar cell efficiency, hence increased the charging time.

Can I charge my devices in Cloudy day?

Yes, it is ok to charging devices in cloudy day. But the charging efficiency will be lower down .and the charging time will be prolonged.

Can I charge my devices in home lighting?

No, The solar foldable charger can not charging devices under home lighting.

24000mAh Solar Power USB Charger Foldable Mobile Phone Battery Pack Power Bank

Name: 24000mAh Solar Power USB Charger Foldable Mobile Phone Battery Pack Power Bank
Brand: Shenzhen Just-Solar Co., Ltd.
SKU: 761747092

Guangdong, ChinaShenzhen Just-Solar Co., Ltd.

US$12.00

50-499 Pieces

US$11.80

500-4,999 Pieces

US$11.50

5,000-9,999 Pieces

US$11.30

10,000-49,999 Pieces

US$10.90

50,000+ Pieces

Sample price:US$16.00/piece.Request sample

Product profile

Customization

Available

Battery is Removable

Capacity

15001-20000mAh

Model NO.

JT-HY1608C

Compatible Brand

All Mobile Phones

Carrying Way

Universal Split

Charging Type

Solar and USB

Applicable Models

Mobile Phone

Cell Type

Li-Polymer

Display

With Display

LED Lighting

Certification

CE, CB, TUV, RoHS, CTIA, PSE, KC, GOST-R, SASO

Socket Type

All Mobile Phones

Recyclable

Solar Panel

5V/1200mA(1.5W*4PCS)

USB Input

5V/2.0A (AC Power or Exteral Solar Panel)

Battery

3.7V/20000mAh

Double Output

5V*2.4A and 5V*1A

LED Light

2W LED Lights(Side of The Product)

Crust Material

PP Silico Gel, Flame Retardant Plastic

Product Color Optional

Black/Yellow/Green/Blue/Yellow

Product Size

155*82*30 mm

Product Weight

530g

Transport Package

Color Box and Carton

Specification

Trademark

OEM, MI

Origin

Shenzhen

Production Capacity

30000PCS/Month

Key features

Foldable Solar Design: Foldable structure with large solar panels for efficient sunlight charging.

Dual Charging Methods: Supports charging via AC power (USB input) and direct solar power under sunlight.

Multiple Color Options: Available in Black, Yellow, Green, Blue, and other optional colors.

High Capacity Battery: Features 20000-24000mAh polymer lithium battery with LED indicators.

Comprehensive Certifications: Certified with CE, CB, TUV, RoHS, CTIA, PSE, KC, GOST-R, and SASO.

Built-in LED Light: Equipped with 2W LED lights for flashlight and SOS flashing functions.

OEM/ODM Service: Custom logo printing and design services available for bulk orders.

Wide Compatibility: Compatible with all mobile phones, MP3 players, tablets, and cameras.

Company profile

Shenzhen Just-Solar Co., Ltd.

Guangdong, China

Business Type: Manufacturer/FactoryExport Year: 2004-05-05Nearest Port: SHEN ZHENAverage Response Time: ≤9.62hTerms of Payment: LC, T/T, PayPal, etc.International Commercial Terms(Incoterms): FOB, CFR, CIF, FAS, DDP, FCA, EXW

AI-Powered supplier vetting

SummaryShenzhen Just-Solar Co., Ltd. is identified as a China-based manufacturer/factory operating in Guangdong, with separate production entities described for domestic and overseas business. The supplier reports multiple management-system certifications, 50 quality-control staff, more than 10 production lines, extensive solar-product output, export activity since 2004, and sales coverage across multiple global regions. It states that it provides product design, R&D, manufacturing, shipment arrangement, warranties, after-sales service, and market suggestions. The available information supports strengths in manufacturing scale, export experience, product development, customization, and stated service capabilities. However, financial credibility cannot be assessed because relevant financial information is excluded, and the representative-title record is invalid or unusable.

Supplier typeThe supplier is explicitly classified as a Manufacturer/Factory, with production locations in Shenzhen, Guangdong, China. Its descriptions identify separate production entities for domestic and overseas business, supporting direct manufacturing involvement rather than a purely trading profile.

CertificationsThe supplier lists BSCI, ISO 9000, ISO 9001, ISO 14001, ISO 14000, HSE, GMP, EICC, and QC 080000 as supplier-management-system certifications. The slice does not provide certificate numbers, validity dates, issuing bodies, or scopes, so the assessment is based on the stated holdings only.

After-Sales capabilityThe supplier explicitly states that it provides a warranty period for each product, after-sale service, and reasonable suggestions for solar products and markets. It also describes support across the full shipment process, indicating a stated service capability beyond production.

R&D capabilityThe supplier states that it designs, researches, develops, and manufactures solar products according to customer requirements, and reports total R&D-engineer experience of 31–40 years. These statements support product-development capability, although they do not quantify patents, laboratories, or new-product launches.

Production capacityThe supplier is identified as a factory and reports more than 10 production lines, 50 quality-control staff, and substantial stated output for solar systems, panels, chargers, and lights. It also lists a broad solar-product portfolio and export coverage across multiple regions, supporting significant production breadth and capacity.

Customization capabilityThe supplier explicitly states that it designs, researches, develops, and manufactures solar products according to customer requirements and supplies products in customers' quality classes. This directly supports customization in product design and quality specifications.

Client casesThe supplier lists Shell, Geodrill, Newmont, Tullow, and Heineken as main customers. These named customer references provide explicit evidence of customer cases, although the slices do not include project details, transaction scope, or verification documentation.

Product Q&A

Q:How to use the product?

1 Open the foldable solar charger and spread them to direct sunshine. 2 Connect foldable solar charger with mobile phone or power bank etc. through the cable, The folding solar charger will be charging devices automatically.

Q:Is this product waterproof?

The folding solar charger is weather resistant which means it will resist the occasional rain or snowed, it is not design for immersion in water.

Q:What's devices can charged with this solar charger?

The foldable solar panel output is 5V. So it is can charge Cell phone, MP3 players, Tablets, Some of Digital Cameras, etc. other's 5V device.

Q:How long does it take to fully charge battery pack or mobile phone from empty using ?

The charging time will be difference based on foldable solar charger power, Sunshine and power bank or mobile phone capacity etc. Generally speaking, for 13W solar charger, under clear sunny days, charging 6 time is around 2 -3 hours, the charging time similar to AC charger.

Q:How long can I get best performance from the foldable solar panel?

You should ensure the solar charger is outside in direct sunlight and that the solar panel is in no way shaded. For best performance, the solar panel should be perpendicular to the sun.