AJ39 Aluminum Magnetic Wireless Power Bank 5000mAh | OEM

Description

AJ39 Power Bank combines a slim metallic body, magnetic wireless charging, and fast Type-C output for compact daily power.

Frequently Asked Questions: AJ39 Aluminum Magnetic Wireless Power Bank

1. What specifications are confirmed for the AJ39?

The published AJ39 specification lists a 5000mAh battery, a 104.7 × 67.7 × 10.1mm body, 103g weight, and an aluminum-alloy housing. Type-C input is listed at 5V/2A and 9V/2A. Type-C output supports 5V/3A, 9V/2.22A, and 12V/1.67A, with a stated maximum of 20W. Wireless output modes are listed as 5W, 7.5W, 10W, and 15W. Final tolerances and protocol support should be confirmed on the approved sample and production datasheet.

2. How should buyers evaluate the AJ39 5000mAh capacity?

The 5000mAh figure is the battery-cell capacity under the manufacturer’s stated test conditions; it is not the same as the energy delivered to a phone. Usable output varies with voltage conversion, wireless transfer loss, temperature, cable condition, device battery size, and charging behavior. Buyers should compare watt-hour data and request an output-capacity or discharge-curve test for the production cell instead of relying on a promised number of full phone charges.

3. What wired and wireless charging performance does the AJ39 support?

The Type-C output is rated up to 20W using the listed voltage and current profiles, while wireless output is rated up to 15W for compatible receiving devices. Actual charging power and time depend on device compatibility, protocol negotiation, battery temperature, alignment, case design, and state of charge. Device-specific claims, including charging a particular phone to a stated percentage within a fixed time, should be verified during sample approval.

4. What should buyers know about the aluminum-alloy housing?

The AJ39 uses an aluminum-alloy housing and has a published weight of 103g. A metal housing can support a slim, premium product design, but thermal behavior depends on the complete structure, cell, charging coil, PCBA, firmware, and ambient conditions. Buyers should request temperature-rise results for wired and wireless charging and confirm the alloy grade, finish, color tolerance, scratch testing, and electrical insulation design for the final configuration.

5. How should magnetic alignment and phone-case compatibility be verified?

Magnetic hold and wireless efficiency depend on magnet layout, coil alignment, phone model, case material, case thickness, and any metal accessories. The current specification confirms magnetic wireless charging but does not publish a verified magnet grade, holding-force value, or universal case-thickness limit. Buyers should test the intended phones and cases and request pull-force, alignment, foreign-object detection, and temperature-rise data for the approved sample.

6. What safety and compliance documents should an AJ39 buyer request?

Required documents depend on the destination market, battery, transport route, and final branded configuration. Buyers should request the applicable battery and transport documents, electrical-safety and EMC reports, wireless-charging compliance evidence where required, material declarations, labeling files, and traceability information for the actual production model. Certification scope and report-model consistency should be checked before shipment.

7. What OEM and ODM options are available for the AJ39?

Standard OEM service starts at 500 pieces for logo and packaging on the existing AJ39 platform. Light customization, such as an approved housing finish, color, documentation, or packaging change, generally starts at 1,000 pieces. Cell, PCBA, firmware, magnetic system, or structural changes are deeper ODM work and generally start at 2,000 pieces. Final MOQ, samples, finish feasibility, tooling, lead time, and certification scope must be confirmed in the quotation.