AJ15 Dual Type-C Power Bank with LED Display | 22.5W OEM

Frequently Asked Questions: AJ15 Dual Type-C Power Bank with LED Display

1. Why does the AJ15 have two Type-C ports and what is the purpose of each one?

The AJ15 features two distinct Type-C ports: Type-C 1 is a full-function bidirectional port that supports 18W input for recharging the power bank and 20W PD output for charging devices, while Type-C 2 is an input-only port limited to 5V/2A (10W) for slower, cooler recharging. The dual-port design solves a common frustration: you can leave a charging cable permanently plugged into Type-C 2 at your desk for slow overnight recharging, and still have Type-C 1 free for fast device charging or quick top-ups. This separation of “recharge port” and “charge port” also reduces wear on a single USB-C connector, extending the product’s lifespan. For B2B buyers, the dual Type-C configuration is a strong differentiator in markets where USB-C has become the universal standard.

2. How does the 1260110 battery cell in the AJ15 differ from the cells used in other YULIDA power banks?

The 1260110 polymer cell (12mm thick, 60mm wide, 110mm long) is YULIDA’s longest-format pouch cell, chosen specifically for the AJ15’s slim 18mm body and 142mm length. The elongated shape allows the cell to span nearly the full length of the power bank, distributing weight evenly and eliminating the “dense brick” feel of shorter, thicker cells. The 1260110 format has a larger surface-area-to-volume ratio than the 146074 or 105555, which improves heat dissipation during sustained 22.5W output. At 3.85V nominal with 10,000mAh capacity, a single 1260110 cell delivers the same energy as two smaller cells while simplifying the internal BMS wiring — fewer solder joints means higher manufacturing reliability.

3. Can the AJ15 charge two devices at full speed through the Type-C 1 port and the USB-A port simultaneously?

Yes, the AJ15 supports dual-device fast charging: Type-C 1 outputs up to 20W PD while the USB-A port simultaneously outputs up to 22.5W through QC 3.0, AFC, or SCP protocols. The total combined output is managed by independent voltage regulators on each port, so plugging in a second device does not cause the first device to drop to slow charging. The 1260110 cell’s 1C continuous discharge rating comfortably supports the combined ~42W peak draw. In practical terms, you can fast-charge a modern Android phone through Type-C 1 and a second phone or tablet through USB-A, both at near-maximum speed. Type-C 2 is input-only and does not participate in output.

4. How does the LED display on the AJ15 differ from other YULIDA models with digital displays?

The AJ15 uses a large-format LED digital display — larger than the AJ09 or AJ13 displays — positioned prominently on the wide front face. The larger digit size (approximately 12mm tall) makes the battery percentage readable from across a desk or nightstand without picking up the power bank. The display also includes a text-based charging status indicator that shows “IN” when the power bank is being recharged and “OUT” when it is charging a device, eliminating any confusion about current flow direction. This is particularly useful with the dual Type-C ports, where it is not immediately obvious which port is active. The display brightness is calibrated for indoor use and dims slightly in low-light environments to avoid being distractingly bright on a nightstand.

5. Why is Type-C 2 limited to 10W input while Type-C 1 supports 18W?

Type-C 2 is intentionally limited to 5V/2A (10W) input for thermal management and battery longevity. Charging a lithium polymer cell at lower current (0.25C versus 0.45C for 18W) generates significantly less heat — approximately 40% less internal temperature rise during a full charge cycle. Over hundreds of cycles, this gentler charging profile can extend the battery’s total service life by 15-20%. Type-C 2 is designed as the “overnight port” — plug it in before bed with any standard 5V USB charger, and wake up to a fully charged power bank that has been treated gently. Type-C 1 is the “quick top-up port” for when you need to recharge as fast as possible during the day.

6. Is the 142×68×18mm body comfortable to hold for extended periods while charging a phone?

At 142mm long, 68mm wide, and 18mm thin with a 221g weight, the AJ15 feels similar to holding a large-screen smartphone — think iPhone 15 Pro Max or Samsung Galaxy S24 Ultra dimensions. The 18mm thinness is the key ergonomic advantage: it sits flat in your palm without creating a pressure point, unlike thicker 25mm+ power banks that feel like gripping a deck of cards. The matte ABS+PC shell provides a non-slip texture that does not attract fingerprints. For extended handheld use (30+ minutes), the AJ15 is comfortable when held alongside the phone rather than stacked behind it, which is how most users naturally position a power bank during active use.

7. What OEM customization takes advantage of the AJ15’s large surface area and dual-port design?

At MOQ 500, the AJ15’s expansive 142×68mm front face provides approximately 96cm² of printable area — one of the largest branding surfaces in YULIDA’s lineup. This space is large enough for detailed brand illustrations, product feature diagrams, or multi-language compliance labels without looking cluttered. The large LED display window can be surrounded by a custom-printed bezel design that frames the digits as part of your brand’s visual language. The dual Type-C ports enable a unique packaging proposition: include a branded USB-C to USB-C cable in the box and market the AJ15 as a “complete USB-C ecosystem charger” — a narrative that resonates with the growing USB-C-only device market. For corporate clients, the AJ15’s slim profile allows for elegant slipcase-style packaging that feels more like a premium stationery item than a tech accessory.