When you’re building a tracking device for containers, fleets, or high-value assets, your power choice defines almost everything that follows.
Total cost. Reliability. Maintenance cycles. Even the size of the enclosure.
That’s why choosing the right battery chemistry is an important business decision.
Primary Cells: Built for the Long Haul
If your device is expected to sit quietly for years, waking up only to transmit data intermittently, primary cells are often the best fit.
Chemistries like Lithium Thionyl Chloride (Li-SOCl₂) and Lithium Manganese Dioxide (Li-MnO₂) deliver exceptional energy density and low self-discharge, meaning they can run for 5–10 years with virtually no maintenance.
They’re ideal for:
- Hard-to-reach assets like rail cars, containers, or underground meters.
- Low-power duty cycles where transmissions are infrequent.
- Extreme environments, since many primary chemistries perform reliably from –55°C to +85°C.
The tradeoff: once depleted, they can’t be recharged. That’s fine for long-life devices but less practical where frequent updates or location changes are required.
Rechargeables: For Active, Always-On Devices
When you need frequent communication, location pings, or integration with solar assist, rechargeable cells take the lead.
Lithium-ion (Li-ion) and Lithium-polymer (Li-poly) offer high cycle life and power delivery stability, especially in GPS or NB-IoT trackers that operate continuously.
They’re suited for:
- Fleet management and telematics that transmit in real time.
- Solar-assisted devices where recharge opportunities are available.
- Shorter deployment intervals, where access for maintenance is expected.
But rechargeables come with their own considerations: protection circuitry, energy harvesting design, and the need to manage temperature and charge cycles carefully.
Key Decision Factors
Before locking in a chemistry, consider these factors early in development:
- Duty Cycle: How often does the device transmit or sense?
- Size & Weight: Can the form factor accommodate a larger rechargeable cell?
- Environment: Will it face temperature extremes or limited access?
- Lifespan Expectations: Is this a “deploy and forget” tracker or a serviceable device?
- Service Model: Can you realistically replace or recharge batteries in the field?
Each answer shapes the battery chemistry choice and the whole product architecture.
Emerging Trends: Hybrid and Smarter Power
Engineers are increasingly blending the two worlds.
Hybrid systems pair primary cells with supercapacitors to handle transmission bursts or integrate small solar panels to extend life without full recharge systems.
At the same time, ultra-low leakage designs and optimized power management ICs are pushing primary battery performance further than ever.
Power Choice = Power Need
There’s no universal “best” chemistry… only the right one for your use case.
The smartest choice balances technical needs with operational realities: how long the device must last, how often it communicates, and what failure really costs.
In logistics and fleet tracking, power is the difference between data you can count on and devices you can’t reach.
