Aideepen | 22.5W Super Fast Charge Motherboard 21700 Battery Fast Charge Power Bank Case Removable Battery Replacement Power Bank Case

Features:1. Supports 22.5W super-fast charging for efficient, rapid charging that saves time.2. Type-C bidirectional fast charging, compatible with the charging needs of a wide range of devices.3. Built-in multi-layer safety protection for comprehensive protection and peace of mind.4. Real-time digital battery level display; slim and lightweight casing for portability, simplicity, and practicality.5. Solder-free design—no soldering required; simply install the battery and it’s ready to use.Product Specifications:Product Name: Digital Display Fast-Charging Power Bank Kit (Batteries not included)Input Specifications: 5V 2A / 5V 3A / 9V 2.2A / 12V 1.6AOutput Specifications: 5V 2A / 5V 3A / 9V 2.2A / 12V 1.6A / 10V 2.25AMainboard Dimensions: Approx. 16 × 21 × 17 mmFast Charging Chip: Zhirong S620Compatible Batteries: Accommodates 2 × 21700 cells; no soldering required (batteries not included)Mainboard Features: Comprehensive protection including overcharge, over-discharge, overvoltage, and overheat protection; high conversion efficiency; stable current and voltageNote: 22.5W uses the VOOC Super Fast Charging protocol; bidirectional fast charging uses the PD 20W protocol; simultaneous output from multiple ports does not support fast chargingAssembly Instructions:1. After receiving the battery case and power bank kit, perform a charging test before installing the batteries. Check the display status to confirm the screen lights up before proceeding with battery installation.2. The battery compartment has clear + (positive) and - (negative) markings. The “+” at the top of the compartment corresponds to the battery’s positive terminal, and the “-” at the bottom corresponds to the battery’s negative terminal. Install the two batteries in parallel; be sure to verify the polarity before installation.3. The mainboard features reverse-polarity protection. If the batteries are installed incorrectly, the device will not power on or charge/discharge. Short-term reverse installation will not immediately burn out the board, but it is strictly prohibited to store the device with batteries installed in reverse or in series for extended periods, as this will cause the protection mechanism to fail, damage the circuitry, and result in board burnout—which is not covered by after-sales service.4. It is normal for the screen not to light up immediately after the batteries are installed. The mainboard requires a charging input or output to activate; the screen will display the battery level normally only after activation.5. 21700 batteries of different brands and capacities may have slight variations in actual dimensions. Some batteries will fit snugly without wobbling, while a small number of batteries with a slightly smaller diameter may become loose after installation, leading to poor contact, power interruptions, or shutdowns. We include matching foam pads in the box; these can be attached to the inside of the battery slide cover to add thickness and secure the battery, resolving the looseness issue and ensuring stable contact with the contacts.6. Be sure to use 21700 batteries with intact casings, normal voltage, and acceptable internal resistance. Many batteries salvaged from old devices or those that have been idle for a long time commonly suffer from excessive internal resistance, capacity degradation, and unstable voltage. While the external voltage of such batteries may appear normal, their internal resistance is actually high, and no issues are apparent when the battery is idle under no-load conditions. Once high-power output begins—such as during fast charging of a smartphone or high-current discharge—batteries with high internal resistance lack sufficient load-carrying capacity, causing excessive instantaneous voltage drops. When the mainboard detects abnormal voltage, the battery level will immediately drop to zero and output will stop, resulting in situations where the deviceshuts down after brief use, fails to discharge completely, or cannot support fast charging.7. Immediately after installing the battery, the digital display may show inaccurate charge levels. The motherboard cannot instantly identify the battery’s true capacity and remaining charge; during initial installation, it provides only a default estimate. The display will return to normal after several discharge-charge cycles, and the battery must be recalibrated through this cycle each time it is reinstalled.Instructions for Use:1. Regarding enabling fast charging for smartphones: Smartphone fast charging protocols are categorized as public or proprietary. This mainboard uses an intelligent fast-charging chip that is compatible with mainstream public fast-charging protocols on the market, meeting the fast-charging needs of various smartphone brands. Before placing an order, please confirm whether your phone supports public protocols to avoid issues with triggering fast charging! If you are unsure, please contact customer service with your phone model, and we will check its fast-charging protocol compatibility for you.2. Regarding heat generation during charging: When the mainboard is in operation, current flows through it, and energy conversion results in losses that are dissipated as heat. During fast charging, the high power output causes more noticeable heat generation. This is a normal physical phenomenon. This product features a solderless spring-contact design; compared to soldered versions, its contact resistance, so the temperature will naturally be higher—this is a normal design characteristic. If used with a battery that has high internal resistance, the device’s heat generation will increase significantly; we recommend using a compliant, low-internal-resistance battery.Package Contents:Solder-free fast-charging battery case *1Lanyard clip *1Type-C to Type-C charging cable *1USB-A to Type-C charging cable *1Foam pad *1