TR16 Digital Battery Capacity Monitor Voltmeter Ammeter 50A–350A
TR16 Digital Battery Capacity Monitor Voltmeter Ammeter 50A–350A
TR16 Waterproof Digital Battery Capacity Monitor — Voltmeter & Ammeter
The TR16 Battery Capacity Tester (coulometer) is a precision instrument that measures voltage, current, and total battery capacity in real time — so you always know the exact state of your battery. Whether you're running an e-bike, balance scooter, cleaning machine, or portable off-grid system, the TR16 gives you complete confidence in your power source.
With full-sealing waterproof construction and a wide voltage range of 8V to 120V, this compact digital monitor is built for demanding environments — indoors or out, hot or cold. Available in three current configurations: 50A, 100A, and 350A.
Made in Mainland China.
Key Features
- Full-Sealing Waterproof Design — Performs stably in rain, heat, and cold (-10°C to 50°C / 14°F to 122°F).
- High Accuracy ±1% — Voltage, current, and charge/discharge capacity all measured with ≤1% error.
- Large Capacity Range — Preset capacity from 0.1 to 999 Ah, compatible with virtually any battery bank.
- Memory Function — Retains data through power interruptions, so cumulative capacity readings are never lost.
- LCD Backlit Display — Clearly shows charge level percentage, voltage, and current at a glance.
- Wide Battery Compatibility — Works with lithium, lithium iron phosphate (LiFePO4), lead-acid, and nickel-metal hydride (NiMH) batteries.
- Ultra-Low Standby Draw — Standby dissipation just 0.5–0.6 mA; sleep mode as low as 50–60 μA.
Specifications
| Model | TR16 |
| Material | ABS |
| Voltage Range | 8V – 120V DC |
| Current Options | 50A / 100A / 350A (optional) |
| Capacity Preset | 0.1 – 999 Ah |
| Voltage Accuracy | ±1.0% |
| Current Accuracy | ±1.0% |
| Capacity Accuracy | ±1.0% |
| Working Dissipation | 10.0–12.0 mA |
| Standby Dissipation | 0.5–0.6 mA |
| Sleep Dissipation | 50–60 μA |
| Operating Temperature | -10°C to 50°C |
| Dimensions | 59 × 59 × 20 mm (2.32 × 2.32 × 0.79 in) |
| Weight | 50A: 200 g | 100A: 270 g | 350A: 410 g |
| Display | Digital LCD with backlight |
| Power Supply | DC |
What's in the Box
- 1 × TR16 Battery Capacity Tester
- 1 × Cable
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Learn more: ENERGY STAR product efficiency guidance
Frequently Asked Questions
Q: Which battery types is the TR16 Battery Capacity Monitor compatible with?
A: The TR16 is compatible with lithium-ion, lithium iron phosphate (LiFePO4), lead-acid, and nickel-metal hydride (NiMH) batteries with a working voltage between 8V and 120V DC — making it suitable for e-bikes, balance cars, solar storage systems, portable equipment, and more.
Q: What does the memory function on the TR16 do?
A: The memory function retains cumulative charge and discharge data even if the device loses power. This ensures your battery state-of-charge readings remain accurate over time without needing to be reset after every power cycle.
Q: Is the TR16 voltmeter and ammeter truly waterproof?
A: Yes. The TR16 features a full-sealing waterproof design that provides stable performance in rainy conditions, high heat, and cold environments within its operating range of -10°C to 50°C (-14°F to 122°F), making it well-suited for outdoor and mobile applications.
Q: What is the difference between the 50A, 100A, and 350A versions?
A: The current rating refers to the maximum continuous current the integrated shunt can measure. The 50A version measures up to 75A, the 100A up to 150A, and the 350A up to 500A. Choose the version that matches or exceeds your system's maximum expected current draw for accurate, safe readings.