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Client Cases: INR21700 5000mAh 7.4V Battery Pack for Reliable High-Usage Hand Sanitizer Dispensers

Customer Case Study
Li-ion 21700 · High Capacity
Hand Sanitizer Dispenser
Pack: INR21700 · 7.4V · 5000mAh

7.4V 5000mAh 21700 Battery Pack for Reliable High-Usage Hand Sanitizer Dispensers

A hand sanitizer dispenser manufacturer needed a battery solution for high-traffic environments such as offices, schools,
and public facilities. Their priority was long runtime, stable motor/solenoid drive, and consistent performance
in daily repeated dispensing cycles. PKNERGY delivered a compact, high-capacity 2S 21700 pack that supports continuous use and reduces maintenance frequency.

Nominal Voltage
7.4V
Capacity
5000mAh
Max Continuous Discharge
10A
Internal Resistance
≤ 140mΩ
Project highlight: For dispenser devices, customers care about uptime and consistent actuation.
We optimized this pack for long runtime, stable output under repeated pulse loads, and production-ready assembly.

Application Photo
Battery Photo
At a glance
High capacity 5000mAh
10A discharge
Stable repeated cycles
Production-ready

Customer Profile (Anonymous) & Project Context

The customer is a manufacturer of automatic hand sanitizer dispensers for high-usage environments.
Due to confidentiality, we do not disclose the company name. Their device uses a small motor/solenoid mechanism,
requiring reliable power pulses and stable voltage across frequent daily dispensing cycles.

Application
Automatic sanitizer dispenser
Usage Pattern
Frequent daily dispensing cycles
Key Priority
Long runtime + stable actuation
Customer environment / device context (optional)

Challenges (What the customer needed to solve)

1) Long runtime to reduce maintenance
In high-traffic areas, frequent battery replacement increases downtime and maintenance costs.
The customer needed higher capacity to extend service intervals.
2) Stable power for repeated actuation
The dispenser mechanism draws pulse current repeatedly. If voltage drops, the motor/solenoid may act inconsistently,
leading to weak dispensing or intermittent failures.
3) Pack consistency & safety window
Production devices require stable thresholds and consistent performance across batches. The customer also needed a clear
operating window for charge/discharge and temperature guidance.
Engineering note
For dispenser devices, “capacity” alone is not enough. We also validate pulse load stability, connector reliability,
and practical batch consistency to reduce field failures.

Solution (How PKNERGY engineered the pack)

PKNERGY delivered a 2S 21700-based battery pack designed for hand sanitizer dispensers that operate continuously throughout the day.
The solution focused on extending runtime, ensuring stable pulse output, and maintaining batch consistency for production delivery.

High Capacity for Longer Uptime
5000mAh capacity reduces charging/replacement frequency in high-traffic environments.
Stable Output Under Pulse Loads
Low internal resistance (≤ 140mΩ) supports stable actuation and reduces voltage drop during repeated dispensing.
High Discharge Capability
Up to 10A continuous discharge supports motor/solenoid requirements with margin.
Integration & Assembly Readiness
Production-friendly harness/connector design reduces assembly errors and improves serviceability.

Technical Specifications

Parameter Value
Model INR21700
Nominal Voltage 7.4V
Nominal Capacity 5000mAh
Size 22.5 × 43.0 × 72.5 mm
Internal Resistance ≤ 140mΩ
Charging Cut-off Voltage 8.4V
Discharge Cut-off Voltage 5.0V
Maximum Constant Charging Current 5000mA
Maximum Continuous Discharging Current 10000mA
Cycle Life ≥ 300 cycles (80% DOD)
Weight 180g
Temperature Guidance (Project Reference)

Charge: 0–10°C (0.2C) · 10–35°C (1C) · 35–45°C (0.5C)

Discharge: -20–0°C (0.2C) · 0–10°C (0.5C) · 10–35°C (2C) · 35–60°C (0.5C)

Results & Customer Feedback

  • Extended uptime: higher capacity reduced battery swaps and charging frequency.
  • Consistent dispensing: stable output improved actuation consistency and user experience.
  • Higher reliability in busy areas: reduced intermittent failures under repeated pulse loads.
  • Production readiness: clear operating window and batch consistency supported deployment.
“Our dispensers are installed in high-traffic places, so uptime is critical. We needed a battery that lasts longer and delivers stable power every time.
PKNERGY helped us improve consistency and reduce maintenance frequency during real deployment.”
— Operations & Product Team, Dispenser Manufacturer (Anonymous)

Photo Gallery (Optional)

Add as many images as needed (battery photos, installation details, testing photos, etc.). Duplicate or remove cards freely.

Caption: pack overview.
Caption: cell structure / welding.
Caption: application environment.

FAQ — Common Questions

Q1: Why do dispensers need stable discharge capability?
Dispensers often use motors/solenoids that draw pulse current. If voltage drops, actuation may weaken or become inconsistent.
A low-IR pack with sufficient discharge margin helps keep every dispensing action reliable.
Q2: What data do you need to design a suitable pack?
Provide operating voltage range, peak/continuous current (especially pulse current), size limits, connector type,
charging method, temperature range, and installation photos/drawings. Usage frequency per day also helps estimate runtime needs.
Q3: Can you customize harness and connectors for assembly?
Yes. We can customize connector models, harness length, polarity, labeling, and wrapping to match your production line and reduce assembly errors.
Q4: How do you ensure batch consistency for deployment?
We align QC criteria with real application risks—commonly including IR window control, voltage/capacity verification,
and stable charge/discharge thresholds. This reduces performance deviation across batches in the field.

Need a custom battery for your smart device?
Share your voltage, space limits, peak/pulse current, connector preference, and installation photos.
Our engineers will propose a production-ready battery solution.
Post time: Jan-05-2026

Customize samples immediately

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