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The KUAIQU SPPS-C305 Adjustable DC Power Supply is a compact and precise power source designed for smartphone and tablet repair technicians, electronics repair shops, and mobile device motherboard diagnostics.
During smartphone and tablet repair, a stable adjustable power supply is essential for checking power consumption, diagnosing short circuits, testing motherboard power rails, and powering devices during repair when the original battery is unavailable or unsuitable.
With 0–30V adjustable output, 0–5A current capability, fine adjustment control, and clear digital readout, the SPPS-C305 provides the control needed for everyday mobile device repair and troubleshooting.
Connect the power supply directly to the device's power input or battery connector to help identify abnormal current consumption caused by shorted components, damaged ICs, or faulty power circuits.
Use an adjustable DC output to simulate a battery supply during repair and testing. This allows technicians to evaluate device power behavior without relying entirely on the original battery.
Monitor voltage and current while attempting to power a smartphone motherboard. Abnormal current behavior can provide useful clues when diagnosing no-power, boot failure, or power-management problems.
The adjustable output makes the SPPS-C305 suitable for powering tablet motherboards during troubleshooting, component replacement, and post-repair testing.
Provide a controlled DC source for testing power management circuits, charging circuits, protection circuits, and other motherboard sections during repair.
The SPPS-C305 uses a dual-knob encoder design for smooth and precise voltage and current adjustment.
0–30V adjustable voltage
0–5A adjustable current
Fine adjustment for accurate power settings
Smooth rotary control
Independent voltage and current adjustment
This allows technicians to gradually increase the output while monitoring the device's current consumption during troubleshooting.
The 4-digit LED display provides clear real-time information for monitoring the power supply output.
The display allows technicians to quickly check:
Output voltage
Output current
Output power
This is particularly useful when diagnosing smartphones and tablets where small changes in current consumption can help identify abnormal power conditions.
The SPPS-C305 features separate controls for power and output, allowing technicians to keep the unit powered while disabling the output when connecting or disconnecting a device.
Main power switch
Independent output ON/OFF control
This provides more convenient control during repeated repair and testing operations.
With a compact form factor and high power density, the SPPS-C305 is well suited to smartphone repair benches, electronics workshops, service centers, and portable repair setups.
A temperature-controlled fan helps manage internal heat while maintaining reliable operation during extended testing.
The built-in 5V/2A USB output provides an additional power source for compatible USB-powered devices and accessories used around the repair workstation.
| Parameter | SPPS-C305 |
|---|---|
| Rated Voltage | 0–30V |
| Rated Current | 0–5A |
| Rated Power | 150W |
| USB Output | 5V / 2A |
| Load Regulation – Voltage | ≤0.3% + 10mV |
| Load Regulation – Current | ≤0.1% + 2.5mA |
| Line Regulation – Voltage | ≤0.01% + 2.5mV |
| Line Regulation – Current | ≤0.1% + 2.5mA |
| Setting Resolution – Voltage | 10mV |
| Setting Resolution – Current | 1mA |
| Readback Resolution – Voltage | 10mV |
| Readback Resolution – Current | 1mA |
| Setting Accuracy – Voltage | ≤0.05% + 10mV |
| Setting Accuracy – Current | ≤0.01% + 10mA |
| Readback Accuracy – Voltage | ≤0.05% + 10mV |
| Readback Accuracy – Current | ≤0.01% + 10mA |
| Ripple – Voltage | ≤100mVp-p / ≤15mVrms |
| Ripple – Current | ≤15mArms |
| Rise Time – No Load | ≤200ms |
| Rise Time – Full Load | ≤300ms |
| Fall Time – No Load | ≤20s |
| Fall Time – Full Load | ≤300ms |
| Dynamic Response | ≤200ms |
| Efficiency | ≥85% |
The SPPS-C305 can be used for:
Smartphone motherboard short-circuit detection
Tablet motherboard troubleshooting
No-power and boot-failure diagnosis
Abnormal current consumption testing
Battery connector power testing
Power management circuit testing
Charging circuit troubleshooting
Motherboard repair and rework
Post-repair power testing
Component-level electronics diagnostics
For smartphone and tablet repair, the power supply is more than a general-purpose DC source. It is a diagnostic tool for understanding how a motherboard responds to controlled voltage and current.
The KUAIQU SPPS-C305 combines adjustable output, precise control, digital monitoring, and independent output switching in a compact design, making it a practical choice for professional smartphone repair shops, tablet technicians, motherboard repair engineers, and electronics service centers.
30-Day return and refund guarantee (Refer to our Refund Policy), 2-year warranty (only available for orders purchased directly from kuaiquinstrument.com), lifetime technique support by KUAIQU.
Please feel free to reach us with any concerns:
Email: kuaiquinstrument@163.com
We strive to reply to you within 24 hours.
Shenzhen Kuaiqu Electronic Co., Ltd. was founded in 2014 and is located in Shenzhen City, Guangdong Province. It is a scientific and technological enterprise integrating,production and sales. Specializing in the production of DC stabilized power supply, variable frequency power supply, switching power supply, program-controlled power supply and other 100 kinds of measuring teaching instruments and industrial special equipment.
We are committed to delivering premium products and exceptional customer service, striving to be your most reliable and intelligent assistant.
At KUAIQU, we are committed to providing our customers with the best value for their purchases. To ensure you always get the best price, we offer a 30-day price guarantee on all products purchased directly from kuaiquinstrument.com. This policy aims to give you confidence and peace of mind when shopping with us.
Our 30-day price guarantee means that if you purchase a product from kuaiquinstrument.com and the price of that product drops within 30 days of your purchase date, you are eligible for a refund of the price difference of the products. (Prices are based on USD. No refunds will be given for price changes in other currencies due to exchange rate fluctuations.)
If you notice that the price of a product you purchased from kuaiquinstrument.com has dropped within 30 days, follow these steps to apply for a refund of the price difference:
At KUAIQU, we strive to provide our customers with high-quality products and exceptional customer service. Our 30-day price guarantee is just one of the ways we ensure you get the best value for your investment. Shop confidently with KUAIQU, knowing that you are always getting the best deal available.
Thank you for choosing KUAIQU. If you have any questions or need further assistance, please do not hesitate to contact our customer support team at kuaiquinstrument@163.com.
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