I. First determine the installation method: built-in or removable?
The first step in selection isn’t reviewing specifications, but clarifying how the battery integrates with the device—built-in versus removable. These configurations offer entirely different product characteristics and application scenarios. Choosing incorrectly will directly impact device design and user experience logic.
Built-in Battery Packs: Ideal for devices prioritizing integrated design, such as embedded sensors, compact medical instruments, and portable testing equipment. These batteries eliminate the need for additional housing clips or replacement mechanisms, maximizing device compactness while enabling tighter integration with internal circuitry to reduce loosening risks. Tefoo’s built-in battery packs feature lightweight aluminum casing with thicknesses as low as 5mm, fitting into compact battery compartments. IP65 dust and water resistance (on select models) ensures reliability in outdoor or humid environments.
Removable Battery Packs:
Ideal for scenarios requiring rapid energy replenishment, such as logistics barcode scanners, handheld terminals, and outdoor inspection devices. Users can resume operation immediately by swapping in a fully charged battery without waiting for charging, significantly boosting productivity. All Tefoo removable battery packs feature anti-misinsertion latches and battery level indicators. The latches remain secure after 1000 insertion/removal cycles, while the indicators provide intuitive remaining power status (red/yellow/green for low/medium/high levels), preventing the use of depleted batteries.
Selection Recommendations:
For devices requiring long-term stationary use without frequent movement, prioritize built-in batteries.
For mobile work scenarios demanding high battery endurance continuity, removable batteries offer the optimal solution.
II. Interface Compatibility: 5-pin blade connectors as standard, with adapter boards for special requirements
Battery-to-host interface compatibility is the most common pitfall during selection—if interfaces don’t match, even perfectly suited battery specs won’t deliver power. Tefoo addresses diverse device interface needs with dual support: standard connectors plus adapter solutions, ensuring universal compatibility.
Standard Interface: 5-pin blade connectors for stability and convenience
All Tefoo standard lithium battery packs feature 5-pin blade connectors, offering three key advantages:
Stable Contact: The blade-style metal contacts offer 30% larger surface area than traditional pin connectors, reducing contact resistance and preventing power interruptions caused by vibration (ideal for applications like logistics vehicles and industrial robotic arms).
Anti-misinsertion Design: The offset orientation ensures correct insertion only, preventing circuit damage from reverse plugging.
Aging Resistance: Nickel-plated contact surfaces maintain ≤50mΩ contact resistance after 500 insertion cycles, ensuring long-term reliability for equipment.
Correspondingly, host devices only need to be equipped with Tefoo standard 5-pin connectors for direct compatibility without additional debugging.
Special Interfaces: Adapter Plates Cover Non-Standard Requirements
If your host device is finalized and uses alternative interface types (e.g., XT60, DC plug, PH2.0 terminals), there’s no need to redesign the host circuitry. Tefoo offers custom adapter boards that convert the 5-pin blade interface to any common interface. These boards feature a compact size (minimum dimensions: 20mm × 15mm × 3mm) for easy integration within your device.
Selection Recommendations:
Prioritize confirming your host’s existing interface type. If the host’s reserved interface is not yet finalized, directly select Tefoo’s standard 5-pin solution (offering the highest compatibility). If the host interface is fixed, provide the interface specifications to Tefoo’s technical team. An adapter board solution can be delivered within 1-3 business days.
III. Structural Requirements: Selecting Based on Battery Compartment Dimensions
The reserved dimensions of the device’s battery compartment determine the physical compatibility of the battery—if the battery is too large, it won’t fit; if too small, it may rattle or even damage the battery. Tefoo employs precision molding to ensure dimensional tolerances ≤±0.1mm for every battery model, while providing detailed product catalogs to help you quickly match sizes.
1. Consult the Product Catalog: Select Directly by Length × Width × Height
Each lithium battery pack in Tefoo’s catalog specifies precise external dimensions (e.g., GS2040FH: 200mm × 40mm × 15mm), weight (approx. 180g), and mounting hole coordinates (if applicable). Simply measure the net internal dimensions of your device’s battery compartment (allowing 1-2mm assembly clearance) and cross-reference the catalog to select compatible models.
For example: If the battery compartment measures 205mm × 45mm × 18mm, the GS2040FH (200×40×15mm) fits perfectly. The reserved clearance prevents squeezing the battery casing during installation.
2. Precision Molds: Guaranteeing Consistent Appearance and Dimensions
Every Tefoo battery casing is manufactured using precision injection molds with ±0.05mm accuracy, ensuring identical dimensions and appearance across all batteries of the same model. This eliminates concerns about inconsistent fit during bulk procurement. Additionally, the casings are made from flame-retardant ABS material, certified UL94 V-0 rated. They resist combustion under high temperatures or short circuits, enhancing equipment safety.
Selection Recommendations:
Before selecting a battery, accurately measure the internal net dimensions of the battery compartment (do not estimate based on external dimensions). For special dimensions (e.g., non-standard battery compartments), contact Tefoo for customized casings (minimum order quantity: 500 units; delivery cycle: 2-4 weeks).
IV. Voltage and Endurance: Select Based on Data Sheets; Boost/Parallel Solutions Meet Higher Demands
The device’s voltage operating range and endurance energy requirements are core factors determining battery parameters. Tefoo addresses both standard needs and special scenarios requiring high voltage or extended endurance through foundational selection + solution expansion.
1. Voltage Selection: Consult Data Sheets; Boost Solutions Address High-Voltage Needs
First, confirm the device’s operating voltage range (e.g., input voltage requirement of 12V-15V). Then, select from Tefoo’s lithium battery operating voltage data sheets—which clearly specify each battery’s nominal voltage, operating voltage range, and cut-off voltage—to ensure voltage compatibility with the device.
Example: If the device operates within 10V-13V, the Tefoo GS2020IM (nominal voltage 10.8V, operating range 9.6V-12.6V) is directly compatible. If the device requires a higher voltage (e.g., 24V), this can be achieved using Tefoo’s boost module—measuring just 30mm × 20mm × 5mm, it reliably elevates the 10.8V battery voltage to 24V with ≥92% conversion efficiency, preventing range reduction due to voltage loss.
2. Energy Capacity: Parallel Expansion for Portable Advantage
For devices demanding higher endurance energy (e.g., requiring continuous operation exceeding 8 hours), there’s no need to select a larger single battery. Tefoo supports parallel capacity expansion via the power management board. This involves connecting multiple batteries of the same model in parallel through the management board, resulting in a total capacity equal to the sum of individual battery capacities (e.g., two 3Ah batteries in parallel yield 6Ah total capacity) while maintaining the original voltage (avoiding exceeding the device’s voltage range).
This solution offers flexibility and portability: Should extended runtime be needed later, simply add more batteries without replacing the host unit or power management module. Additionally, the management board features balanced charging, ensuring consistent charge levels across multiple batteries and preventing lifespan reduction caused by capacity discrepancies.
Selection Recommendations:
First, determine the single-cell battery model based on the device’s voltage range. If runtime is insufficient, prioritize capacity expansion through parallel connection (40% lower cost than custom large batteries). For devices with special voltage requirements, simply pair with a boost module—no need for a new battery selection.
V. Power and Runtime: Calculate Capacity Accurately to Avoid Redundant Waste
Many people confuse battery capacity with battery energy when selecting models, leading to either insufficient runtime or excessively redundant capacity (increasing cost and size). In reality, by clearly defining the device’s power requirements and desired runtime, you can precisely calculate the required battery capacity and then select the corresponding model.
Conclusion
Tefoo lithium-ion battery selection follows a logical sequence: first define the application scenario → then match parameters → finally address special requirements:
1. Determine installation method: built-in or removable;
2. Select standard 5-pin interface or adapter board based on host device;
3. Verify physical dimensions via product catalog according to battery compartment size;
4. Choose base model within voltage range; address higher requirements via boost/parallel configurations;
5. Calculate capacity based on power + runtime to avoid redundancy
This methodology ensures precise battery pack matching for both standard devices and specialized scenarios, guaranteeing stable operation while controlling costs and size. For specific challenges during selection (e.g., non-standard battery compartments or unique voltage requirements), contact Tefoo’s technical team directly for personalized one-on-one selection solutions.
