A Practical Guide to Choosing Batteries for Portable Water Quality Testers
Reliable, stable, and long-lasting battery solutions for portable water testing instruments.
Water Quality Testing · Portable Instruments · Custom Lithium Battery
Power Requirements of Portable Water Quality Testers
Portable water quality testing instruments are widely used in environmental monitoring,
wastewater treatment, aquaculture, municipal utilities, and emergency response scenarios.
These applications place strict demands on battery performance.
- Lightweight and portable design for field use
- Stable voltage supply for sensitive sensors (pH, TDS, turbidity, chlorine, heavy metals)
- Long runtime: typically 6–12 hours continuous operation
- Wide temperature adaptability: –10°C to +45°C or higher
- Rechargeable with reliable cycle life (≥500 cycles)
Common Battery Types for Water Testing Devices
Lithium-Ion Batteries (18650 / 21700)
- High energy density and mature supply chain
- Cost-effective for most portable analyzers
- Best for multi-parameter testers and spectrophotometers
Lithium Polymer (LiPo) Batteries
- Slim and lightweight with flexible shapes
- Ideal for compact or pen-type testers
- Requires precise BMS design
Lithium Iron Phosphate (LiFePO4)
- Excellent safety and very stable discharge
- Long cycle life (2000+ cycles)
- Suitable for rugged, industrial-grade field kits
Primary Batteries (AA / Coin Cells)
- Convenient but limited runtime
- Not environmentally friendly
- Recommended only as backup power
Typical Battery Specifications for Water Quality Testers
| Parameter | Typical Range | Application Notes |
|---|---|---|
| Nominal Voltage | 3.7V / 7.4V | Single-cell or 2S design depending on device architecture |
| Capacity | 3000mAh – 10,000mAh | Supports 8–12 hours of continuous field testing |
| Battery Type | Li-ion / LiPo / LiFePO4 | Selected based on size, weight, and safety requirements |
| Discharge Rate | 1C – 2C continuous | Ensures stable power for sensor and MCU operation |
| Cycle Life | ≥500 cycles | Long-term reliability for professional users |
| Operating Temperature | -20°C to +60°C | Suitable for outdoor and industrial environments |
| Protection | Smart BMS | Overcharge, over-discharge, overcurrent, short circuit |
Battery Selection Guidelines
- Runtime Requirement: 3000–6000mAh for daily testing, ≥10,000mAh for extended field work
- Measurement Accuracy: LiFePO4 for applications requiring ultra-stable voltage
- Size & Weight: LiPo for ultra-compact devices, Li-ion for balanced designs
- Lifetime Cost: Li-ion offers lower upfront cost, LiFePO4 offers longer service life
PKNERGY Battery Solutions for Water Testing Instruments
PKNERGY specializes in custom battery packs for portable analytical instruments.
We provide complete solutions from cell selection to BMS design and mechanical integration.
- Customized Li-ion, LiPo, and LiFePO4 battery packs
- Stable voltage output for accurate sensor readings
- Wide temperature performance: –20°C to +60°C
- Support for UN38.3, CE, MSDS certifications
- Flexible connectors including JST, PH, and waterproof IP67 options
