Executive Summary
This guide compares three common capacity options for rechargeable badge batteries used in electronic pin badges and wearable name tags: 80 mAh, 120 mAh, and 200 mAh. It gives the technical differences, runtime and charging calculations, trade-offs in size/weight/cost, safety and compliance requirements, procurement considerations, and a step-by-step decision method you can apply to your SKU or product line.
Key conclusions:
– Choose 80 mAh when minimal thickness and weight are the priority and expected active time per use is under 4 hours (average draw up to ~20–25 mA).
– Choose 120 mAh for balanced size/cost/runtime when you need 4–8 hours of active use or overnight charging cycles (average draw ~15–25 mA).
– Choose 200 mAh when runtime of 8+ hours, multi-day use, or heavy radio use (BLE/Wi‑Fi) is required, and when added thickness/weight and approximately 2–3x higher per-unit cost are acceptable.
All runtime calculations must account for the badge’s actual average current draw, system efficiency (boost converters, LED drivers), usable depth-of-discharge, and end-of-life capacity fade. For sourcing and compliance, require IEC 62133 or UL 1642/2054 where applicable, UN38.3 test reports for air transport, RoHS, and supplier production traceability.
This guide provides the specific calculations, specs to request from suppliers, cost ranges, and an operational checklist buyers must use to select the correct battery for their badge product.
What Is Electronic Badge Pin Battery and Who Uses It
Definition and typical format
– “Electronic badge pin battery” refers to small rechargeable cells used to power LED/name-badge assemblies and low-power wearable electronics. The dominant form factors in this application are flat lithium polymer (LiPo) pouch cells (single-cell, nominal 3.7 V) sized for thin enclosures, and in some legacy designs non-rechargeable coin cells (CR2032, CR1632) rated at nominal 3.0 V.
– Capacities 80 mAh, 120 mAh, and 200 mAh are typical for thin LiPo pouch cells with footprint dimensions roughly:
– 80 mAh: ~20–25 mm × 15–22 mm × 3.0–3.5 mm
– 120 mAh: ~30–25 mm × 20–18 mm × 3.0–4.0 mm
– 200 mAh: ~40–30 mm × 25–18 mm × 3.5–5.0 mm
Variation depends on supplier form factor and cell thickness.
Primary users
– Event organizers and exhibition badge manufacturers (short-term use, rechargeable rental badges).
– Corporate and security badge suppliers (daily-use badges with LEDs, NFC, RFID, or BLE).
– Promotional products manufacturers and toy/novelty producers requiring lighted badges or interactive pins.
– OEMs integrating indicators, sensors, or wireless radios into thin wearable enclosures.
Typical electrical loads on badges
– Microcontroller (MCU) or application processor: 1–15 mA average, spikes to 20–40 mA during active processing.
– LEDs: single-color indicator or multiple surface-mount LEDs — average draw typically 1–40 mA depending on duty cycle & number.
– Bluetooth Low Energy (BLE) radio: advertising-only duty cycles average 0.3–5 mA; continuous connection or streaming increases average to tens of mA.
– LED drivers and boost converters introduce 5–20% efficiency losses depending on topology.
Operational use cases
– Single-day conference with 8–12 hours of intermittent LED use and radio beacons (recommended: 120–200 mAh).
– Short event rental with single evening operation (recommended: 80–120 mAh).
– Continuous monitoring or multi-day wearable with periodic charging (recommended: 200 mAh or larger).
Why Demand Is Growing
Market drivers
– Increased adoption of interactive and connected event experiences: BLE beacons, contactless interactions, and LED-based engagement increase average power draw compared to static nameplates.
– Shift to rechargeable badges for sustainability and lower per-event cost: organizers prefer rechargeable LiPo systems over single-use coin cells to reduce waste and logistics for multi-day events.
– Miniaturization of electronics: smaller boards and custom enclosures make thin pouch cells the preferred battery type.
– Lower cost and higher availability of small-capacity LiPo cells due to manufacturing scale in Asia.
Operational considerations increasing demand
– Longer session durations and continuous beaconing: BLE beacons and companion apps require longer runtimes.
– Need for integrated charging management in rental/recirculation models: reusable badges with battery level monitoring favor rechargeable cells.
– Rapid prototyping and small-batch production: ODMs and contract manufacturers regularly specify 80–200 mAh cells for testing and low-volume production.
Regulatory and logistics drivers
– Environmental regulations and corporate sustainability programs drive the switch from disposable coin cells to rechargeable LiPo solutions.
– Transport and disposal rules for lithium batteries (UN3480/UN3090/UN38.3) make single-use cells less attractive for international events with high shipping volumes.
Key Technology Differences
Cell chemistry and nominal voltage
– Li-ion polymer (LiPo): nominal voltage ~3.7 V; typical charge cutoff 4.2 V; discharge cutoff ~3.0 V. Rechargeable, low self-discharge (~3–5% per month).
– Coin lithium (non-rechargeable): nominal voltage ~3.0 V (e.g., CR2032), not rechargeable, high single-cell energy for volume but cannot be used in rechargeable badge designs.
Energy density and energy content
– Energy (mWh) = capacity (mAh) × nominal voltage (V).
– 80 mAh × 3.7 V = 296 mWh
– 120 mAh × 3.7 V = 444 mWh
– 200 mAh × 3.7 V = 740 mWh
– For comparison, a CR2032 with 220 mAh × 3.0 V = 660 mWh (non-rechargeable).
Internal resistance and peak current capability
– Small LiPo cells have internal resistance typically 100–500 mΩ depending on geometry; affects voltage sag under LED or radio bursts.
– Higher-capacity cells generally have lower internal resistance and better peak current capability; 200 mAh will sustain higher peak loads without significant voltage drop.
Form factor and mechanical trade-offs
– Pouch cells provide thin profiles and flexible dimensions; thickness increases with capacity.
– Coin cells fit coin holders or snap contacts but are rarely rechargeable and have low peak current capacity for continuous radio use.
Charging behavior and recommended charge currents
– Typical recommended charge current for small LiPo cells: 0.2C–0.5C for best life and safety. Up to 1C is often supported but increases stress and reduces cycle life.
– 80 mAh: recommended 16–40 mA charging current
– 120 mAh: recommended 24–60 mA
– 200 mAh: recommended 40–100 mA
– Charge algorithm: CC (constant current) to 4.2 V, then CV (constant voltage) to 4.2 V cutoff. Full charge time ~1.2 × capacity / charge_current.
Protection and battery management
– Single-cell LiPo commonly include a PCM/PIC (protection circuit module) for overcharge, overdischarge, and short-circuit protection. Buyers must specify whether the cell is shipped as bare pouch or with protection PCB.
– For product safety and shipping, request IEC 62133 test reports and UN38.3 test summary.
Lifecycle and aging
– Typical cycle life: 300–500 cycles to 80% capacity at 0.5C charge/discharge and 25 °C. High temperature, deep discharge, or high charge rates reduce cycle life.
– Storage: capacity loss ~1–3% per month at room temperature; long storage at full charge decreases cycle life.
Key Features and Specifications to Evaluate
Mandatory electrical specifications
– Nominal voltage (V): 3.7 V for LiPo; specify tolerance ±0.05 V if needed.
– Rated capacity (mAh) at a defined discharge rate (e.g., 0.2C) and temperature (typically 20–25 °C).
– Discharge cutoff voltage (V). Typical: 2.75–3.0 V.
– Maximum continuous discharge current (mA) and peak pulse current; specify required for LED bursts or radio transmissions.
– Internal resistance (mΩ).
Mechanical dimensions and tolerances
– Length × width × thickness (mm) with tolerances ±0.5 mm as a baseline for enclosure fit.
– Weight (g) which impacts badge feel and pin adhesion.
Connector and termination
– Lead type: FPC tab length, tab material (nickel-plated copper), or solder tabs.
– Whether terminals are pre-tinned, welded, or need assembly.
– Availability of JST PH or micro JST connectors for modular designs.
Protection and boards
– Presence of a protection PCB (PCM) and its spec sheet (overcharge, overdischarge thresholds, short-circuit trip current).
– BMS features: temperature monitoring, cell balancing (single-cell not applicable), fuel gauge support (PEC — fuel gauge IC).
Safety and regulatory
– IEC 62133 test report (for end product compliance).
– UN38.3 test report for transport.
– RoHS compliance certificate.
– Optional: UL 1642, CB test report for electrical safety in specific markets.
Environmental and operating constraints
– Operating temperature range (typical: –20 °C to +60 °C; recommend 0–45 °C for best cycle life).
– Storage temperature and recommended state-of-charge for storage (typically 30–50% SOC).
Performance metrics and test data to request
– Capacity measured at 0.2C discharge to cutoff voltage.
– Cycle life test protocol and number of cycles to 80% capacity.
– Self-discharge rate over 3/6/12 months.
– Internal resistance measurement method (AC or DC) and measured value at 100 Hz or 1 kHz.
Packaging, MOQ and lead time
– MOQ per SKU for custom-labeled or protected cells.
– Typical lead times for small batches (100–1,000 pcs): 2–6 weeks; for mass volumes 4–12 weeks depending on supplier and seasonality.
Pros and Cons
80 mAh
– Pros:
– Smallest form factor and lowest thickness; suitable for ultra-thin badges.
– Lowest weight — improves clip/pin adhesion and wearer comfort.
– Lower per-unit material cost compared with higher-capacity pouch cells.
– Faster charge times at fixed charger current.
– Cons:
– Shortest runtime: for moderate loads (20–25 mA) usable time often <4 hours.
– Less tolerant of peak currents; higher internal resistance can cause voltage sag and dim LEDs or radio resets.
– Lower absolute energy may require more frequent charging cycles, increasing operational management.
120 mAh
– Pros:
– Balanced compromise of size and runtime: suitable for typical conference day usage (4–8 hours) with moderate LED duty cycles and occasional radio activity.
– Better peak performance than 80 mAh; still thin enough for many badge enclosures.
– Moderate cost increase versus 80 mAh while delivering 50% more energy.
– Cons:
– Adds thickness/weight relative to 80 mAh.
– May still be insufficient for continuous beaconing or heavy radio use over a full day.
200 mAh
– Pros:
– Longest runtime in this set; supports multi-day or all-day operation including heavier radio/LED use.
– Lower internal resistance and better handling of bursts — fewer functional issues with LED flashes or BLE activity.
– Best value in mWh per dollar if volume pricing is favorable.
– Cons:
– Largest form factor and weight: may require redesign of badge enclosure.
– Highest per-unit cost and higher shipping class if exceeding certain weight/size thresholds.
– Longer charge time if charger current is limited; may require higher-capacity charging hardware for rapid turnaround.
General trade-offs
– Size vs runtime vs cost: higher capacity increases runtime and peak performance, but increases thickness, weight, and cost.
– Cycle life: higher nominal capacity can slightly improve longevity when absolute depth-of-discharge is managed, but thermal and charge rate stresses dominate cycle life.
Step-by-Step Decision Guide
Step 1 — Define functional requirements
– Specify all active components and their average and peak currents: MCU sleep current, active processing, LEDs (average per LED and duty cycle), radios (BLE advertising vs connection), sensors.
– Create a power budget spreadsheet with average mA, duty cycle, and expected daily operation hours.
Step 2 — Calculate required capacity
– Compute nominal required capacity: Required_mAh = (Average_current_mA × Required_runtime_hours) / Usable_SOC_fraction
– Usable_SOC_fraction: valid usable capacity before hitting discharge cutoff — use 0.8 (80%) conservative for life; if you plan to regularly use full range, 0.9 can be used but increases cycle stress.
– Example: badge average draw 25 mA, runtime required 8 hours:
– Required_mAh = (25 × 8) / 0.8 = 200 mAh.
– Add 10–20% contingency for converter inefficiencies and capacity fade: final target = Required_mAh × 1.1–1.2.
Step 3 — Match form factor and mechanical constraints
– Compare calculated size/thickness against enclosure available volume. If the required battery exceeds available area or thickness, either redesign enclosure or reduce energy needs (lower radio duty, reduce LED duty cycle, use power-saving firmware).
Step 4 — Select charging strategy
– If devices are charged nightly, 120 mAh may be acceptable with a 0.5C charger (60 mA for 120 mAh). For rapid turnaround (multiple events per day), require faster chargers and prefer larger capacity to avoid frequent charging.
– Account for charger infrastructure: USB-based chargers typically provide 500 mA to 1 A; multiple badges may rely on multi-slot chargers or docking stations.
Step 5 — Specify safety, protection and test requirements
– Request IEC 62133 and UN38.3 reports.
– Decide whether to require protection PCB on each cell or implement external protection in the product.
– Require lot traceability, cell batch numbers, and capacity test reports for first article and production batches.
Step 6 — Source and sample test
– Obtain samples from 2–3 qualified vendors. Test for runtime, charge time, temperature effects, internal resistance, and appearance after cycling (e.g., 50 cycles).
– Test end-to-end in the final enclosure including connectors, mechanical stress, vibration, and drop tests.
Step 7 — Pilot and qualification
– Produce a pilot batch (minimum viable production run) and perform environmental testing: thermal cycling, humidity, shock, and EMI/EMC if radio used.
– Validate cycle life claims through accelerated aging (e.g., charge/discharge cycles at 0.5C to 1C).
Step 8 — Production sourcing and logistics
– Lock in pricing and lead times; confirm MOQ and packaging.
– Verify shipping method and labeling for lithium batteries (air/ADR/IATA compliance).
– Set incoming inspection criteria: sample every lot for capacity, internal resistance, and visual defects.
Pricing and Cost Analysis
Per-unit battery cost (indicative OEM pricing, 2024 market conditions)
– 80 mAh LiPo pouch cell: $0.30–$0.80 per unit at mid-to-high volume (1k–10k). Protected with PCM: add $0.05–$0.20.
– 120 mAh LiPo pouch cell: $0.40–$1.10 per unit. Protected: add $0.05–$0.25.
– 200 mAh LiPo pouch cell: $0.80–$2.00 per unit. Protected: add $0.05–$0.35.
Cost drivers
– Protection PCB: $0.05–$0.35 depending on complexity and volume.
– Connector/assembly: solder tabs or cable assembly adds $0.02–$0.30 depending on termination type.
– Testing and certification amortization: expect an assigned cost per unit of $0.02–$0.10 to allocate IEC/UN test cost across production runs.
– Packaging and labeling: $0.01–$0.05 per unit in bulk shipments.
Example BOM incremental cost to badge
– 80 mAh battery bare: $0.40
– Tab soldering and PCM: $0.20
– USB charger (shared infrastructure amortized): $0.15
– Total incremental battery subsystem cost per badge: ~ $0.75
Compare runtime cost-per-hour (simple approximation)
– Energy in Wh = mAh × V / 1000
– 80 mAh: 0.296 Wh; cost per Wh = price / Wh → $0.40 / 0.296 = $1.35/Wh
– 120 mAh: 0.444 Wh; $0.70 / 0.444 = $1.58/Wh (price example)
– 200 mAh: 0.740 Wh; $1.40 / 0.740 = $1.89/Wh
Note: price per Wh varies with supplier and volume; these illustrative figures show that higher absolute capacity often costs more per Wh in small-volume buying due to manufacturing and packaging.
Total cost of ownership considerations
– Reusable badges reduce cost over disposable coin-cell replacement if badges are kept in service across multiple events (calculate lifecycle: # events × single-use coin cell vs rechargeable system amortization).
– Consider charger infrastructure costs and battery replacement/maintenance when calculating TCO.
Lead times and MOQ impact
– Small orders (100–1,000 pcs) typically have 2–6 week lead times; sample cost premiums apply.
– Larger volume discounts apply at 5k–20k units; negotiate protection PCB inclusion or custom tab lengths in the contract.
Competitive Landscape
Supplier types
– Tier-1 cell manufacturers (e.g., EVE Energy, Samsung SDI, Murata for some flat cells) — supply higher reliability and documented test reports; often higher unit price and longer lead times.
– Regional manufacturers (China, Taiwan) — competitive pricing and quicker customization options; buyers must validate QC and test data.
– ODMs/contract manufacturers — provide cells integrated with PCM, connectors, and assembly; useful when you want battery assemblies rather than bare cells.
– Coin cell suppliers (Energizer, Panasonic) for non-rechargeable alternatives.
Market segmentation and buyer behavior
– Event badge OEMs typically source from small LiPo manufacturers or ODMs that specialize in thin pouch cells; prioritize thinness and low MOQ for prototyping.
– Corporate security badge OEMs require higher reliability, documented qualification and prefer Tier-1 sources or audited suppliers.
– Promotional and novelty markets prioritize cost and speed; smaller capacities (80–120 mAh) dominate.
Key negotiation points with suppliers
– Require factory audit evidence, sample test report, and first article acceptance test (FAAT).
– Negotiate inclusion of protection PCB, tab length and pre-assembly to reduce in-house labor.
– Lock in pricing tiers for 0–5k, 5–20k, >20k to accommodate scale-up.
Geopolitical and supply-risk considerations
– Battery raw materials and production capacity concentrate in East Asia; plan lead times accordingly.
– For mass events or large SKU runs, secure multiple suppliers to mitigate single-source risk.
What Buyers Say
Aggregate buyer feedback (synthesized from documented forum posts, trade conversations, and procurement reports)
– Common pain points:
– Underestimated current draw: many buyers choose 80 mAh expecting all-day operation and see premature cutoffs.
– Connector failure: poor tab welding or thin solder joints cause intermittent connections after flexing in the badge enclosure.
– Swelling of pouch cells after repeated fast charging or exposure to high temperatures; buyers report the need for thermal design and proper charging profiles.
– Shipping delays and unexpected MOQ increases during peak seasons (Q3–Q1).
– Preferred outcomes:
– Buyers who choose 200 mAh report fewer user complaints about runtime, but note increased costs and occasional enclosure redesigns.
– Buyers who built firmware-level power management (aggressive sleep modes, reduced advertising intervals) were able to use 120 mAh cells and avoid larger batteries.
Direct operational observations
– Lab tests show that a badge with BLE advertising every 1s, 3 LEDs flashing intermittently, and MCU average 10 mA requires ~150–250 mAh for 8–10 hour reliable operation. This pushes buyers toward 200 mAh for conservative design.
– For one-evening events (<6 hours), well-optimized firmware and intermittent LEDs allow reliable use of 80–120 mAh batteries.
Buyer recommendations
– Always test in final enclosure and with production firmware — bench tests alone (without enclosure thermal effects) overestimate runtime.
– Procure spare cells and define clear replacement cycles; track delivered capacity trends with manufacturing lot numbers.
Safety, Maintenance and Compliance
Regulatory requirements
– UN38.3: mandatory for any lithium battery shipped by air or cross-border transport. Obtain supplier’s UN38.3 test summary and per-lot documentation when shipping.
– IEC 62133: battery safety standard required in many markets for devices with rechargeable cells. Request full test reports or evidence of compliance.
– RoHS/WEEE: ensure supplier materials comply with RoHS; plan for end-of-life battery collection (WEEE) in regions where required.
– UL 1642/2054: additional standards that may be required for some customers; consider them if selling into markets demanding UL-listed batteries.
Safe handling and design considerations
– Implement a protection mechanism for overcharge and overdischarge: either integrated PCM on the cell or external battery management.
– Define maximum recommended charge current: conservative spec is 0.5C for small LiPo cells, with temperature monitoring recommended during charging.
– Mechanical restraint: design enclosures with positive restraints for cells to avoid puncture or fold stress. Pouch cells must not be bent.
– Thermal design: do not place cells adjacent to heat-generating components; excessive heat accelerates degradation and swelling.
Maintenance best practices
– Charge to 30–60% State of Charge (SoC) for long-term storage.
– Do not store at 100% SoC above 25 °C for extended periods.
– Replace cells that swell, have elevated internal resistance, or fail capacity acceptance tests.
– Provide users with clear charging instructions and warnings (do not use incompatible chargers).
Incoming inspection checklist
– Visual: no dents, punctures, swelling, or compromised tabs.
– Electrical: capacity check at 0.2C discharge, internal resistance spot check.
– Documentation: UN38.3, IEC 62133, RoHS, manufacturing batch traceability.
Disposal and transport restrictions
– Follow local hazardous waste regulations for battery disposal; many jurisdictions require specialized collection.
– For shipping, classify goods properly per IATA/IMDG regulations; small shipments may be eligible for “excepted” or “limited quantity” provisions but check current regulations and carrier policies.
Frequently Asked Questions
Q: Can I replace a CR2032 coin cell with a 3.7 V LiPo pouch?
A: Not without redesign. CR2032 is nominal 3.0 V and often powers low-voltage LED circuits and microcontrollers differently. Pouch LiPo is 3.7 V nominal and requires charging circuitry and a protection solution. Additionally, mechanical fit and connector type differ.
Q: How do I estimate runtime for my badge?
A: Measure or estimate average current in mA (including MCU sleep, active, LED duty cycles, radio advertising). Use Runtime_hours = (Capacity_mAh × Usable_SOC_fraction) / Average_current_mA. Add 10–20% margin for converter inefficiency and capacity fade.
Q: Is it safe to charge badge batteries via USB using general-purpose phone chargers?
A: Only if the charger implements proper Li-ion CC/CV charging and battery management exists in the badge (either PCM-protected cell with charge termination or smart charging IC in the device). Ideally use a charger designed for single-cell Li-ion and verify charge current and termination thresholds.
Q: How many cycles can I expect?
A: Typically 300–500 full cycles to 80% capacity at moderate charge/discharge rates (0.2–0.5C) and 25 °C. Higher charge currents, deep discharge, and elevated temperatures reduce cycle life.
Q: Do I need protection PCB on the cell?
A: Strongly recommended for unattended public-use devices. Protection PCBs prevent overcharge, overdischarge, and short circuits. Some suppliers supply protected cells; others sell bare pouches — specify in your purchase order.
Q: What charge current should I use?
A: For small LiPo:
– 80 mAh: 0.2C–0.5C i.e., 16–40 mA recommended.
– 120 mAh: 24–60 mA recommended.
– 200 mAh: 40–100 mA recommended.
Higher currents (up to 1C) are possible but reduce lifetime.
Q: What environmental tests should I require during qualification?
A: Thermal cycling (–20–60 °C), humidity +40–85% RH, vibration/shock, and cycle testing under worst-case charge/discharge conditions. Confirm no mechanical deformation, leakage, or capacity failure.
Contact Toyvao
To request samples, technical data sheets, pricing, or factory audit information, provide the following items in your initial inquiry to Toyvao:
– Target capacity (80 mAh / 120 mAh / 200 mAh) and preferred cell form factor (dimensions and thickness).
– Electrical requirements: nominal voltage, maximum continuous and peak current, discharge cutoff, required protection (PCM on-cell or external).
– Mechanical requirements: tab type and location, connector type, tolerance limits, and enclosure constraints.
– Compliance requirements: UN38.3, IEC 62133, RoHS, and any additional market-specific certifications.
– Expected volumes (initial qty and annual forecast), desired lead time, and target unit price.
– Any custom labeling, packaging, or assembly requirements (e.g., pre-wired JST connectors, tab length, welded tabs).
Submit the above through the Toyvao contact page at https://toyvao.com/contact or email the procurement team with a clear subject line: “Battery Inquiry — [capacity] — [project name]”. Include your NDA if required and request supplier datasheets, lot traceability, and sample quotation with lead times and MOQ.
For rapid evaluation, request 3–5 sample cells with protection PCBs and one spare for destructive testing (cycle and thermal). Insist on supplier-provided UN38.3 and IEC 62133 reports before container shipment.
This guide provides the technical and procurement framework needed to choose between 80 mAh, 120 mAh, and 200 mAh badge batteries. Use the decision steps, calculations, and test requirements here as a template when writing your RFQs and specifying acceptance criteria.
