- 20000mAh (8870129*2)
- 177.5*90*31mm
- DC 5V/3A, 9V/2.22A max
- 5V/3A, 9V/2A, 10V/2.25A, 12V/1.5A, 15W wireless
- 550g
- 5.5V/1.5W
Solar Power Bank, 20000mAh, 15W Wireless, Watch & Earbuds Charging SL-911
Product Overview
A 20000 mAh pack built around one idea: charge the whole kit from one surface. The magnetic wireless coil runs a three-in-one mode, so a phone charges at up to 15 W while a smartwatch and an earbud case share the same pad at 2.5 W and 5 W. Three Type-C cables are built into the body and a PD 22.5 W controller covers 10 V/2.25 A and 12 V/1.5 A fast charging on compatible handsets. The 5.5 V/1.5 W solar panel keeps the pack topped up outdoors, and a 2 W LED panel handles lighting. Two aluminium carabiners let it hang from a backpack, a bike frame or a tent pole. At 177.5 x 90 x 31 mm and 550 g it balances capacity against portability for travel retail.
Key Features
- Three-in-one wireless - Phone at 15 W, earbuds at 5 W and smartwatch at 2.5 W on the same magnetic pad.
- PD 22.5 W output - USB-A reaches 5 V/3 A, 9 V/2 A, 10 V/2.25 A and 12 V/1.5 A for fast charging.
- 20000 mAh capacity - Two 8870129 cells, roughly four phone charges per cycle.
- Three built-in cables - Type-C cables moulded into the housing for cable-free top-ups.
- Dual carabiners - Two aluminium clips let the pack hang from a pack, tent or handlebar.
- Solar top-up - A 5.5 V/1.5 W panel on the back extends runtime on multi-day trips.
- 2 W LED light - A rear panel light for tents, cars and power cuts.
- Four colourways - Black/orange, black/green, black/blue and pure black.
Specifications
| Parameter | Value |
|---|---|
| Model | SL-911 |
| Capacity | 20000 mAh (8870129 x 2) |
| Battery type | Lithium-polymer |
| Main controller | PD 22.5 W |
| Micro USB input | DC 5 V/2.4 A, 9 V/2 A (max) |
| Type-C input | DC 5 V/3 A, 9 V/2.22 A (max) |
| Type-C output | DC 5 V/3 A, 9 V/2.2 A, 12 V/1.67 A |
| USB 1 output | DC 5 V/3 A, 9 V/2 A, 10 V/2.25 A, 12 V/1.5 A (max) |
| Wireless output | 2.5 W / 5 W / 7.5 W / 10 W / 15 W (three-in-one) |
| Charging cable output | Type-C 5 V/3 A, 9 V/2.2 A, 12 V/1.67 A; Lightning 5 V/2.1 A |
| Charging cable input | USB-A 5 V/3 A, 9 V/2.22 A (max) |
| LED light | 2 W rear panel LED |
| Solar panel | 5.5 V / 1.5 W |
| Charging time | About 5-6 hours |
| Product size | 177.5 x 90 x 31 mm |
| Net weight | 550 g |
| Colours | Black/orange, black/green, black/blue, pure black |
Product Details
OEM & ODM Services
Casun has built power banks in Shenzhen since 2011, and the SL-9 series is our own outdoor platform rather than a bought-in shell. For this model we offer custom logo, custom shell colours, retail gift box and master carton design, cable and port configuration changes, and capacity or panel variants on volume orders. Seven in-house engineers handle PCBA and structure design, so a custom version is a normal production run.
- MOQ 100 pcs for standard colours, mixed models accepted
- Samples in about 5-7 days, bulk production in 15-25 days
- Trade terms EXW, FOB, CIF or DDP; T/T 30% deposit, 70% before shipment
- 12-month warranty against manufacturing defects
Frequently Asked Questions
Can it charge a smartwatch and a phone together?
Yes. The three-in-one coil supports a phone at up to 15 W, earbuds at 5 W and a smartwatch at 2.5 W at the same time, as long as the devices support Qi charging.
How fast is the wired output?
PD 22.5 W maximum through USB-A at 10 V/2.25 A or 12 V/1.5 A, and 12 V/1.67 A through Type-C.
What are the carabiners for?
They clip the pack to a backpack strap, tent loop or bike frame so it can charge while being carried.
What is your minimum order quantity (MOQ)?
Our MOQ is 100 units for most power bank and speaker models. Selected items can start from as low as 2 units, so retailers and startups can test the market before scaling. Mixed orders across our product categories are accepted.
Can you provide OEM/ODM or private label services?
Yes. As an Alibaba.com certified Custom Manufacturer we provide full OEM and ODM support: custom logo, packaging, colors, graphic design and product development. Our 7 R&D engineers handle PCBA design through final assembly, and free samples are available on most models for evaluation before bulk orders.
What certifications and quality control do you have?
We are ISO 9001 certified. Products comply with CE, RoHS, FCC, KC and EN 62479, and our power banks are Qi wireless charging certified. Every batch passes incoming material inspection, in-line QC and final inspection before shipment. Social compliance is verified by BSCI and Sedex.
What is your lead time and production capacity?
Sample lead time is typically 5-7 days. Bulk production usually takes 15-25 days depending on quantity and customization level, and can extend to 30 days for complex custom work. Our factory runs 3 production lines with an annual capacity of 700,000 units and a 99% on-time dispatch rate.
What are your shipping and payment terms?
We support EXW, FOB, CIF and DDP for most destinations, shipping by sea, air or express (DHL/FedEx/UPS). Payment terms are T/T with 30% deposit and 70% balance before shipment, and Trade Assurance covers product quality and on-time delivery.
What warranty and after-sales support do you offer?
All products carry a 12-month warranty covering manufacturing defects. We provide free replacement parts or repair guidance within the warranty period, and our team typically responds within 2 hours.
Casun store rating 4.8 / 5 from 43 verified buyer reviews on Alibaba.com.
Looking for MOQ, lead time, certification or payment details? See all frequently asked questions.
OEM/ODM power banks from 5,000 to 30,000mAh, including magnetic, fast-charging, solar and ultra-thin models.