Why can your wireless mouse go a whole year without changing batteries? The IT2705 DC Power Analyzer can help you find out!

1. Large current fluctuations

The power consumption curve of a wireless mouse is like a roller coaster. Do you remember to turn off your mouse when you’re not using the computer? Wireless mice enter sleep mode during such periods, keeping the current at a minimal level. But the moment you use it, the current can spike by thousands of times instantly.

2. Extremely fast response
You might think it’s your fast hand movement—but it’s actually the mouse responding even faster. Mode switches happen within microseconds. Ordinary multimeters are often too slow to catch it: did a pulse just pass by? Miss it, and critical data is lost.

3. Design “talent” varies
Different brands and models have drastically different power designs. Some office mice prioritize long battery life, using low-power sensors and chips. High-performance gaming mice, on the other hand, have ultra-precise sensors with maximum reporting rates, naturally draining power much faster—changing batteries every few months is normal.

Testing low-power wireless Bluetooth mice isn’t as simple as plugging in a power supply
It’s like putting the mouse under 24-hour ECG monitoring, recording every tiny pulse of power consumption and analyzing its usage patterns. Only by understanding all its “power-saving tricks” can you design products with longer battery life. This requires a power supply with high-speed, high-precision characteristics and fast sampling capabilities.

ITECH’s new IT2705 DC Power Analyzer is a highly integrated modular DC power analyzer, specifically designed for dynamic power measurement, battery simulation, and power characteristic analysis.

Test Case: Wireless Bluetooth Mouse Power Consumption Test

Operating Mode Analysis:

1. Active Mode: When the user moves the mouse or performs operations, the optical sensor, microprocessor, and Bluetooth RF module are all active, resulting in the highest power consumption.
2. Standby Mode: During short periods of inactivity, the sensor remains in low-power monitoring, and Bluetooth stays connected.
3. Sleep Mode: After extended inactivity, most circuits are turned off, leaving only the basic wake-up function, resulting in low power consumption.

Test Equipment: IT2705 DC Power Analyzer + IT27814 SMU Module

Test Procedure: Using the PV2700 software’s power analysis function, set the sampling interval and the curves to be displayed, then collect voltage, current, and power data of the mouse from active mode through to sleep mode.

Test Results: Using the statistical data provided by the power analysis function, we obtained the following:

• Standby Mode: 17 mA, 25 mW
• Active Mode: 25 mA, 37 mW
• Sleep Mode: 134 μA, 200 μW

Additionally, the analysis allows calculation of average, maximum, and minimum values of current and power for each mode, helping R&D engineers optimize the design.

Test Highlights:

1. High-precision and high-resolution measurement: With the optional IT27814 SMU module, the IT2705 DC Power Analyzer achieves voltage accuracy up to 0.015% + 300 μV and current accuracy up to 0.025% + 5 μA. Thanks to its μA-level high resolution, it can precisely measure microamp-level currents in standby or sleep modes and clearly capture power consumption details across all states from deep sleep to full-power operation.
2. Unique long-term data logging capability: For scenarios such as battery life testing that require long-term power monitoring, the IT2705’s Data Logger function can operate continuously at high sampling rates, processing data in real time. It comprehensively records maximum, minimum, and average values of current and voltage, supporting continuous testing from minutes to days—or even longer—meeting various durability evaluation requirements.
3. High-speed sampling and transient waveform capture: The IT2705’s Scope function supports sampling rates up to 200 kHz, enabling accurate capture of current transients and pulse signals. It clearly presents rapid power consumption changes, helping engineers deeply analyze transient response characteristics and abnormal power peaks.