Gaqqee | PD 100W Fast Charge Transparent Power Bank Case 8‑Cells 21700 Battery Holder Kit No Soldering DC Adjustable Voltage LED

8x21700 DIY Power Bank Case Transparent PD 100W Bidirectional Fast Charging Battery Box No Soldering DC Adjustable Voltage LEDDC Push-Button Type---Dual DC ports, Dual Type-C portsHigh-Brightness Outdoor LED Light20 cool-light LEDs + 20 warm-light LEDs + 6 blue-light LEDs + 6 red-light LEDsFeatures1. PD 100W fast charging supports full-speed flash charging for laptops, tablets, and smartphones, delivering powerful battery life2. Solder-free design requires no soldering iron; easily install or replace battery cells without changing the case3. Highly transparent acrylic case provides a clear view of the internal structure, satisfying the visual needs of tech enthusiasts4. Supports step-by-step voltage adjustment to accommodate a wide range of devices; high-brightness lighting with SOS mode—an outdoor essential5. Built-in multi-layer protection ensures safety and stability during useParameterCompatible Batteries: 3.7V flat-top, unprotected ternary lithium 21700 batteriesBattery Configuration: 2 in parallel, 4 in series (all batteries must be identical)Note: The battery casing must not be damaged. Carefully identify the positive and negative terminals and do not install them incorrectly, as this may cause a battery short circuit or even spontaneous combustion!Effective Battery Pack Voltage: 12.5V–16.5V (Note: Voltage drop increases with more series connections)Built-in input overvoltage and undervoltage protection; integrated output overcurrent, overvoltage, and short-circuit protection; built-in battery overcharge, over-discharge, and overcurrent protection; built-in IC over-temperature protection;DC Port Output SpecificationsDC1 Specifications: 5.5 × 2.1DC2 Specifications: 5.5 × 2.5Output Voltage: 3.3V–24V (multi-point voltage adjustment or continuous voltage adjustment available)Note: Only the DC port supports voltage adjustment; it cannot be used simultaneously with the USB and Type-C ports. When multiple ports are in use simultaneously, the output is limited to 5V. The DC function is normally open and normally closed; once enabled, it remains active and cannot be automatically turned off. To turn off the circuit, switch back to USB modeOutput Power: 100W (MAX)Output Current: 5A (MAX)Button Controls: Press and hold the power button to enter DC mode; press the left or right function buttons once to adjust the voltage range; press and hold the left or right function buttons for continuous voltage adjustmentUSB Output5V/9V/12V/15V/20V/3A;Supported Fast Charging Protocols: SCP; UFCS; PE1.1; PE2.0; AFC; QC3+; QC3.0; QC2.0; FCP; SFCP; SVOOC, and VOOC (requires a fast-charging cable with a recognition chip);Note: Charging for most smartphones is limited to 10V/3A (30W); when multiple ports are in use simultaneously, only standard 5V charging is available;Type-C OutputPD 100W 20V/5A (supports laptop charging recognition mode)Recognized fast charging protocols: PD 3.1; PD 3.0; PD 2.0; 5V/9V/12V/15V/20V-3A;Supported fast charging protocols: PD 3.0; PD 2.0; PPS; SCP; UFCS; PE 1.1; PE 2.0; AFC; QC3+; QC3.0; QC2.0; FCP; SFCP; SVOOC and VOOC (requires a fast-charging cable with a recognition chip);PD charging cables without a recognition chip typically limit most smartphone charging to 10V/3A (30W); those with a high-voltage recognition chip generally support 9–20V (up to 45W);Note: Simultaneous output to multiple ports does not support fast charging;Type-C InputSupported fast charging protocols: PD 100W 20V/5A (PD 3.1; PD 3.0; PD 2.0); 5V/9V/12V/15V/20V-3A;PD 3.0; PD 2.0; PPS; SCP; UFCS; AFC; FCP; SVOOC and VOOC (requires a fast-charging cable with a recognition chip);Supports 5V charging and discharging simultaneously;Note: If your phone’s proprietary protocol does not support fast charging (USB without fast charging), you can use PD charging (Type-C output). The PD open standard supports over 90% of smartphones and provides higher and more stable output power.Basic Knowledge of Fast Charging Protocols for Charging and Discharging1. Fast charging is not a one-size-fits-all solution; it is merely a general term. Each smartphone manufacturer has its own proprietary protocol, and support for any one of these protocols enables fast charging;2. If fast charging is not detected, only standard charging will occur. Standard charging for smartphones is typically limited to 10W or less, i.e., within 5V × 2A;3. Fast-charging protocols are automatically matched between the phone and its chipset. While some phones support multiple protocols, the phone’s power management system selects the optimal fast-charging protocol based on the charging environment—this cannot be manually controlled;4. If the charging cable lacks a high-voltage detection chip or is not a dedicated charging cable, the current is capped at 3A. Since the voltage for phone charging protocols is generally within 10V, the maximum power output for charging a phone typically does not exceed 30W.5. The fast-charging protocols listed above represent the maximum power ratings specified by manufacturers. However, most smartphone manufacturers impose restrictions when non-original chargers are used, so the actual charging power is generally below 30W. Additionally, charging a smartphone is a variable process; the current is controlled by the phone’s own power management system and cannot be fixed—it can only fluctuate within the specified power range;6. Flash charging involves high-current charging at 5V, which places extremely high demands on the charging cable; please use a dedicated flash-charging cable;7. If the fast-charging current does not increase while the phone’s battery level is below 80%, the issue is almost certainly caused by a faulty charging cable or poor contact;8. If the charging current for a battery pack is below 1A when the battery level is below 90%, and the charger has a power output of 10W or more, the issue is almost certainly caused by a faulty charging cable or the presence of high-internal-resistance, low-rate cells in the battery pack;9. Since the current through the balancing resistors is extremely low, the balancing process will fail if there is a significant voltage difference between the cells. Please ensure that the actual voltage, capacity, rate, and internal resistance of all 8 cells are consistent; otherwise, one set of cells may discharge prematurely, causing the output to be interrupted;DC Touch Type---Type-C port + DC port + IP port20 warm-light LED beadsFeatures1. PD 100W high-power super-fast charging, meeting the high-power power supply needs of multiple devices2. Transparent casing design allows for a clear view of the internal circuit board and battery cells, making it easy to monitor internal operating status3. Solder-free 8-cell 21700 battery holder—simply insert the cells to use; battery installation, removal, and replacement are simple4. Touch-controlled DC output voltage adjustment, compatible with various DC loads such as small laboratory equipment—one device, multiple uses5. Built-in multi-layer protection features ensure safety and stability during useParameterInput Power: 30–65W (requires high-performance charger and charging cable)Maximum DC output: 100W; fluctuations in current when powering a laptop are normalType-C Input Protocols: 5V/3.1A (Standard Input), SCP: 40W, PD 3.0: 65W, UFCS: 33WUSB Output Protocols5V/3.1A (Standard Output)SCP: 40WUFCS: 33WPE 1.1: 7.5WPE 2.+: 45WQC 3.0: 36WQC 2.0: 24WAFC: 18WFCP: 18WSFCP: 18WSimultaneous multi-port output is 5V onlyType-C Output Protocols5V/3.1A (Standard Output)PD3.1: 100WPD 3.1: 100WSCP: 40WUFCS: 33VPE 1.1: 7.5WPE 2.0: 7.5WPE 2.0: 30WQC 3+: 45WPPS: 44WPPS: 44WQC 3+: 45WQC 3.0: 36WQC 2.0: 24WAFC: 18WFCP: 18WSFCP: 18WMulti-port output does not support fast chargingButton Functions1. Double-click the button to turn on the LED light; press once more to cycle through LED modes: 100% brightness → 50% brightness → 25% brightness → 10Hz strobe → 3Hz flash → SOS2. Press and hold the button for 2 seconds to enter or exit DC mode. The “DC” indicator will light up; tap the button to adjust the DC voltage (adjustment in 0.1V increments/decrements).Precautions1. After assembly, use a charger to charge the power bank to activate it.2. After activation, fully discharge the power bank first, then charge it for approximately 20 hours to ensure the battery is fully balanced.3. Only use flat-top 21700 batteries without a protection circuit. The battery must be in good condition, and the positive terminal must not be damaged. If the insulation is damaged, it must be insulated. Do not use pointed-top batteries, batteries with protection circuits, or any other batteries that do not meet these requirements.Package includePower Bank Kit1Accessory Pack1