1. Introduction
The DollaTek TY23 is a high-precision universal battery tester designed to provide real-time information on battery usage. It functions as a coulomb meter, capacity indicator, Li-ion/LiFePO4 detector, and voltmeter. This device accurately measures voltage, current, and capacity, helping users understand the operational status of their battery packs. It also features a power-off memory function to retain data.
This versatile tool is suitable for a wide range of applications, including portable mobile equipment, emergency power supplies, energy storage batteries, AGVs, UPS power supplies, electric vehicles, robot vacuum cleaners, and various other measurement tools and meters.
2. Safety Information
- Always ensure the battery tester and the battery under test are powered off before making any connections.
- Verify correct polarity when connecting the tester to the battery. Incorrect connections can damage the device or the battery.
- Do not exceed the specified voltage (8-120V) or current (0-150A peak) limits of the device.
- Keep the device away from water, moisture, and extreme temperatures.
- Do not attempt to disassemble or repair the device yourself. Refer to qualified personnel for service.
- Use the provided sampler and shielding wire for optimal performance and safety.
3. Product Overview
The DollaTek TY23 Battery Tester system consists of two main components: the display unit and the current sampler (shunt).
3.1 Display Unit

Figure 1: Front panel of the DollaTek TY23 Battery Tester, featuring the LCD display and control buttons for voltage (V), current/amp-hours (A/Ah), and percentage (%).

Figure 2: The back of the DollaTek TY23 Battery Tester, showing the wiring connector and product details including model number TY23 and voltage range.
3.2 Current Sampler (Shunt)

Figure 3: A clear view of the 100A current shunt (sampler) component, which is essential for accurate current measurement with the TY23 battery tester. It features robust terminals for secure connections.
4. Setup and Installation
Proper installation of the TY23 Battery Tester is crucial for accurate readings and safe operation. The system requires connecting the display unit to the battery via the provided current sampler and shielding wire.
4.1 Connection Steps
- Power Off: Ensure both the battery and any connected loads are completely powered off before beginning installation.
- Connect Sampler: Connect the current sampler (shunt) in series with the negative terminal of your battery and the negative terminal of your load. The sampler has designated 'B-' (battery negative) and 'P-' (load negative) terminals.
- Connect Display Unit: Use the provided 2-meter shielding wire to connect the display unit to the sampler. The small connector on the shielding wire plugs into the port on the back of the display unit, and the other end connects to the corresponding terminals on the sampler.
- Verify Connections: Double-check all connections for correct polarity and secure fastening to prevent loose contacts and potential damage.
- Power On: Once all connections are secure, you may power on your battery system. The display unit should illuminate and begin showing readings.
Note: A detailed wiring diagram is typically included with the product packaging. Always refer to it for specific connection points.
5. Operating Instructions
After successful installation, the DollaTek TY23 Battery Tester is ready for operation. The clear LCD display provides essential battery information at a glance.
5.1 Basic Operation
- Power On: The device automatically powers on when connected to a battery with sufficient voltage.
- Display Readings: The LCD screen will immediately show the current battery voltage (V), current (A), and remaining capacity (Ah or %).
- Button Functions: The buttons on the front panel allow you to cycle through different display modes or adjust settings (if applicable). Refer to the specific button labels (V, A/Ah, %) for their functions.
- Power-Off Memory: The TY23 features a power-off memory function, retaining the last measured capacity data even after the device is turned off or disconnected.

Figure 4: The DollaTek TY23 Battery Tester in operation, showing its display indicating battery capacity and voltage, integrated with an electric scooter. This demonstrates a typical application scenario.

Figure 5: The DollaTek TY23 Battery Tester shown next to a robot vacuum cleaner, illustrating its versatility for monitoring battery health in various portable devices and home appliances.
6. Maintenance
To ensure the longevity and accurate performance of your DollaTek TY23 Battery Tester, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the display and casing. Avoid abrasive cleaners or solvents that could damage the plastic or screen.
- Storage: Store the device in a cool, dry place, away from direct sunlight and extreme temperatures.
- Connections: Periodically check all wiring connections for tightness and signs of corrosion. Loose connections can lead to inaccurate readings or device malfunction.
- Physical Protection: While the casing is durable, avoid dropping the device or subjecting it to strong impacts.
7. Troubleshooting
If you encounter issues with your DollaTek TY23 Battery Tester, consider the following troubleshooting steps:
- No Display/No Power:
- Check all power connections to ensure they are secure and correctly wired.
- Verify that the battery voltage is within the operating range (8-120V).
- Inaccurate Readings:
- Ensure the current sampler (shunt) is correctly installed in series with the negative battery line.
- Check the shielding wire connection between the display unit and the sampler for any damage or loose contacts.
- Confirm that the battery type and capacity settings (if configurable) match your battery.
- Display Flickering:
- This could indicate an unstable power supply or loose connections. Recheck all wiring.
If problems persist after attempting these steps, please contact customer support for further assistance.
8. Specifications
Detailed technical specifications for the DollaTek TY23 Battery Tester:
- Model: TY23
- Display Mode: LCD with Backlight (Yellow)
- Capacity Range: 0.1 - 999 Ah
- Standby Power Consumption: <0.5 mA
- Support Voltage: 8 - 120 V
- Working Current: 100 A (Peak 0 - 150 A)
- Compatible Batteries: LiFePO4, Lead-Acid, Ternary Carp Battery, Polymer Carp Battery, Nickel-Hydrogen, etc.
- Product Dimensions (Display Unit): 64 x 34 mm
- Sampler Dimensions: 56 x 25 x 30 mm
- Applicable Current (Sampler): 0 - 150 A
- Package Contents: 1 x Battery Tester (Display Unit), 1 x Sampler, 1 x 2m Shielding Wire

Figure 6: A technical diagram illustrating the precise dimensions of the DollaTek TY23 Battery Tester unit in millimeters, useful for installation planning and integration.
9. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or contact DollaTek customer service directly. Keep your purchase receipt as proof of purchase for any warranty claims.
Manufacturer: DollaTek
Product Reference: CP100336
