Views: 0 Author: ZERNE Battery Technical Content Team Publish Time: 2026-10-01 Origin: Site
Asset trackers often spend long periods attached to equipment, pallets, containers or other items that may be difficult to access. They may remain quiet during storage, report periodically during transport and send more frequent updates when movement or an exception occurs.
That pattern makes battery design an operational decision as well as an electrical one. The battery has to support the device’s actual reporting behavior, fit its enclosure and suit the way a fleet will be maintained. A tracker that meets a bench target can still create service problems if its low-battery alert arrives too late or technicians cannot replace its battery in the field.
This article focuses on the design choices that connect tracker operating modes with battery service planning. It does not provide a general battery-life formula or compare individual battery models.
Start asset tracker battery design with the deployment and service plan. Define how the tracker behaves during storage, normal movement and exception events. Measure current in those modes, then decide whether the battery will be rechargeable, replaced as a service item or sealed into a unit that is exchanged as a whole.
Before production, verify that:
Sleep and communication modes match the planned reporting schedule.
The device can handle peak current during positioning and transmission.
Low-battery reporting leaves enough time for a service response.
A technician can access and replace the battery or tracker as intended.
Validation covers signal conditions, temperature and installation—not only a quiet bench test.
A tracker’s workload depends on what it monitors and how the customer uses the tracking data. A returnable pallet moving between warehouses has a different reporting pattern from a container crossing regions or a rental machine that is idle between jobs.
Write down the tracker’s expected states before selecting a battery:
Deployment state | Typical device behavior | Battery design question |
|---|---|---|
Storage or idle period | Long sleep intervals with limited checks | What current remains active while the tracker is quiet? |
Normal movement | Scheduled location or status reports | How often must the device wake, position and transmit? |
Exception event | More frequent updates after motion, loss or an alarm | Can the battery support the temporary load increase? |
Poor coverage | Repeated or extended communication attempts | What does the device do when a report cannot be sent? |
Service or return | Battery inspection, replacement or recharging | How will the tracker’s status guide the next service action? |
These states should reflect the product requirements, not only the most favorable operating scenario. If the tracker has a high-frequency mode, include it in the power profile even if it is expected to be used occasionally.
Infrequent reporting does not automatically mean low total energy use. The tracker may spend most of its time asleep, so small continuous loads from the regulator, sensors, memory or other circuitry can accumulate across a long deployment.
Measure the complete device in its intended sleep state. Confirm that peripherals enter their planned low-power states and that firmware does not leave unnecessary functions running between reports. A regulator’s datasheet current alone does not represent the sleep consumption of the finished tracker.
This distinction matters because the battery supports the entire system. A pack cannot compensate efficiently for a device that never reaches its intended quiet state.
A scheduled report may include sensor sampling, location acquisition, data processing and wireless transmission. Measure the current waveform across the full event, including startup and return to sleep. Record both the peak load and how long each stage lasts.
The modem or positioning module may draw a short current peak even when the average current is low. The battery, protection circuit, connector and wiring must all support the actual load without causing a reset or failed transmission.
A tracker’s exception mode may request more frequent updates than its normal schedule. Weak coverage can also lead to repeated network searches or delayed transmissions. Define what the firmware should do in these situations:
How long may it continue trying to connect?
Does it store data and transmit later?
Can it return to sleep after a failed attempt?
Which alerts justify temporarily increasing report frequency?
How does the device leave the high-activity mode?
These decisions affect energy use and the amount of time a tracker remains reachable. Agree on them with the product and operations teams before battery capacity is finalized.
A deployed tracker can be maintained in several ways. A technician may replace or recharge the battery, exchange the tracker, or leave the unit in place until a scheduled collection. The right approach depends on how accessible the asset is and whether a service visit is practical.
Plan this decision alongside the enclosure:
Replaceable battery: Provide a serviceable compartment, suitable retention and clear installation guidance.
Rechargeable tracker: Define how units will be collected, charged and returned to service.
Exchangeable tracker: Make removal and reinstallation practical, and plan how device identity and asset assignment will be preserved.
Sealed tracker: Define an end-of-service process for the complete unit, including inspection and responsible battery handling.
Each approach affects housing design, connectors, assembly, sealing and service cost. A battery that is easy to replace on a workbench may not be suitable for equipment located outdoors or in transit.
An alert should give the operations team enough time to act. If the tracker reports a low-battery condition only when the device is close to shutting down, dispatch teams may not have a practical replacement window.
Set the warning strategy around the service workflow. Decide what status the tracker reports, how often it sends the status and who receives it. If the device estimates remaining capacity, validate that estimate under the intended temperature, load and reporting conditions. A simple voltage threshold may not provide a reliable state-of-charge estimate for every operating condition.
The alert should also distinguish a true battery concern from a temporary voltage change during a high-current event. Test the threshold against both quiet operation and peak transmission loads.
For fleets that use replaceable batteries, specify the replacement pack clearly. The service document should identify the battery voltage, connector, dimensions, protection configuration and approved replacement method. It should also record the tracker model or hardware revision it supports.
This reduces the chance of a field replacement creating a mismatch in fit, wiring or electrical behavior. If more than one tracker revision exists, keep its battery specification and service instructions distinct.
The battery, enclosure and attachment method work as one assembly. A tracker mounted under equipment or inside a container may have limited service access. A design that requires a special tool or precise connector alignment can slow maintenance across a large fleet.
During mechanical review, check:
Space for the battery, protection components, wires and connector.
Access for the intended replacement or charging procedure.
Retention against vibration and movement.
Protection of wires from sharp edges and enclosure pressure.
Whether opening the enclosure affects a seal or requires replacing a gasket.
Whether technicians can identify the correct battery orientation and connection.
For rechargeable LiPo projects, ZERNE’s high-capacity lithium polymer battery options can be reviewed against the tracker’s available space, voltage and operating requirements. The final choice should be confirmed with the complete enclosure and electronics.
A design target should be tested with the tracker assembled as it will be installed. Measure sleep current, normal reports, exception behavior and retry sequences using the production-intent firmware. Record the conditions so results from different builds can be compared.
Include operating conditions that can change the energy demand:
Strong and weak communication coverage
Indoor, outdoor and metal-adjacent installation locations
Normal movement and extended idle periods
Required hot and cold operating conditions
Repeated transmission or positioning events
Battery aging or reduced available capacity, where relevant to the project
Check that voltage remains within the device’s operating range during peak events. Confirm that the tracker returns to its intended sleep state afterward and that low-battery alerts arrive in time for the planned service response.
A short prototype test cannot by itself prove a long deployment life. Use measured current data and a documented usage profile to support the operating-life estimate, then continue field monitoring after deployment. Update the estimate if real usage differs from the original reporting and movement assumptions.
A clear project brief helps the battery and device teams assess the same operating conditions. Include:
Tracker type and asset environment
Battery cavity dimensions and enclosure drawings
Nominal voltage and capacity target
Sleep, report, positioning and transmission current measurements
Normal and exception reporting schedules
Peak current and device voltage limits
Charging, replacement or tracker-exchange approach
Connector, wire length and protection requirements
Operating and storage temperature conditions
Low-battery alert and service-response expectations
Sample quantity, validation needs and target production timing
ZERNE supports battery matching and custom battery evaluation for tracker applications. The asset tracker battery solution is a useful starting point for OEM teams comparing tracker requirements with battery options.
More frequent reports usually mean more wake, positioning and transmission events. Measure the complete event and the time the device spends asleep between events to build a representative load profile.
A tracker may spend much of its deployment in a low-power state. Continuous current from the complete device accumulates over time, so sleep current should include the regulator, sensors, memory and other active circuitry.
The choice depends on service access, charging plans, enclosure design and the cost of a field visit. A replaceable battery can keep the tracker installed, while exchanging the whole unit may simplify service where battery access is difficult.
It should provide a clear status early enough for the planned maintenance response. Validate the warning behavior under expected temperatures and peak loads so temporary voltage changes do not create confusing alerts.
Provide enclosure dimensions, voltage and capacity targets, measured sleep and active currents, reporting modes, peak current, charging or replacement plan, connector needs and operating conditions.
Asset tracker battery design should follow the deployment pattern and the service plan. Define quiet, routine and exception modes; measure the complete device in each state; and decide how technicians will recharge, replace or exchange units before the enclosure is finalized.
Test the assembled tracker with production-intent firmware and representative signal, temperature and installation conditions.
