Custom 3.7V Lithium Battery Solutions for LED Under-Cabinet Lights and Motion Sensor Light Strips

Introduction

LED under-cabinet lighting and motion-activated light strips have become essential in modern kitchens,
wardrobes, hallways, RVs, and smart homes. These compact lighting products rely on efficient, lightweight,
and long-lasting lithium battery systems to achieve true wire-free installation and user-friendly illumination.

A well-designed rechargeable lithium battery pack ensures stable brightness, reliable motion detection,
and long standby time. PKNERGY focuses on custom Li-ion and lithium polymer battery packs
for LED lighting manufacturers, OEM developers, and smart home brands, providing end-to-end engineering support
from cell selection to pack design and certification.

Application Background: Wireless LED Lighting

Wireless LED lighting solutions have grown rapidly, driven by the demand for easy installation,
minimal wiring, and high energy efficiency. Typical applications include:

• Rechargeable LED under-cabinet lights for kitchens and pantries
• Motion sensor light strips for wardrobes, closets and drawers
• Hallway and stair sensor lights for night-time safety
• Battery-powered LED bars for RVs, caravans and tiny homes

Key product requirements include:

• Compact size to fit in slim lamp housings
• High energy density for long lighting duration
• Stable voltage output to maintain consistent brightness
• Low self-discharge for PIR motion-sensor standby mode
• Safe performance in kitchens, cabinets, and enclosed spaces
• Global compliance for different regional markets

Technical challenges usually come from limited internal space, heat management during charging,
optimized power usage for PIR sensors, and ensuring long cycle life under frequent charge–discharge cycles.
Choosing the right battery chemistry and pack design is critical. For projects that require higher power
or wider temperature performance, PKNERGY can also provide
Custom LiFePO4 Battery
solutions.

PKNERGY 3.7V Lithium Battery Solution

PKNERGY offers a wide range of optimized 3.7V lithium-ion and lithium polymer (LiPo) battery packs
for LED under-cabinet lighting and motion sensor strips. Depending on your housing and runtime requirements,
we help you balance cost, size and performance.

Battery Chemistry Options

• Lithium Polymer (LiPo) – Thin, lightweight and flexible in shape, ideal for ultra-slim
  LED bars or curved light strips. Often used together with
  Custom Lithium Polymer Battery
  development projects.
• Cylindrical Li-ion (18650 / 14500 / 21700) – Cost-effective and durable with mature supply chain,
  suitable for slightly larger lamps where cylindrical cells can be arranged efficiently.

Typical Battery Specifications

• Nominal voltage: 3.7V
• Capacity range: 600mAh – 5000mAh (customized according to runtime needs)
• Continuous discharge rate: 0.2C – 1C for stable LED brightness
• Cycle life: 500 – 1000 cycles under standard conditions
• Integrated PCM / BMS for overcharge, over-discharge and short-circuit protection
• Charging interface: USB Type-C or Micro-USB circuit integration
• Connector options: JST, Molex, or fully customized wire harness
• Certifications: UN38.3, IEC62133, CE, MSDS; UL optional based on project request

Engineering Support

• Custom sizes to perfectly fit your lighting housing and PCB layout
• Assistance with power consumption optimization for LEDs and PIR sensors
• Rapid prototyping, typically 7–10 days for initial samples
• Injection-molded battery housings and brackets available
• Application-oriented support for smart home and
  consumer electronics power solutions

Value for Buyers, PM and Engineers

For Buyers

• Competitive cost structure for high-volume lighting projects
• Stable supply chain with A-grade cells and long-term cooperation
• Reliable quality leading to fewer warranty claims and returns

For PM / Project Leaders

• Fast sampling and responsive engineering communication
• Low MOQ support for new model trials and niche markets
• Clear project timelines and complete technical documentation

For Engineers

• High discharge stability to ensure constant LED brightness over the entire runtime
• Optimized PCM design for motion-sensor and sleep-mode efficiency
• Safe thermal performance in enclosed cabinet and wardrobe environments
• Flexible design that can also be adapted to other slim devices such as
  wearables using our
  ultra-thin battery solutions

Case Study: European Kitchen Lighting Brand

A European kitchen lighting brand approached PKNERGY for a rechargeable under-cabinet LED bar
with long standby time and slim housing.

Project Requirements

• Integrated motion sensing for user-friendly operation
• At least 60 days standby time in typical home use
• Very slim design for cabinet surface mounting

PKNERGY Solution

• Custom 3.7V 2000mAh LiPo battery with only 7mm thickness
• Customized PCM with ultra-low standby current for PIR sensor system
• USB Type-C charging module integrated with the lighting PCB

Project Results

• Runtime improved by approximately 35% compared with the original design
• Annual shipment volume reached 50,000+ units
• Zero battery-related failures reported in field feedback

This case demonstrates how a well-optimized 3.7V lithium battery pack can significantly improve
product performance and user satisfaction in the LED lighting market.

Why Work with PKNERGY

• 26 years of lithium battery manufacturing and pack design experience
• Strong capability in custom Li-ion, LiPo, LiFePO4 and even sodium-ion battery packs
• 20M+ cells and 500K+ battery packs supplied annually to global customers
• Fast sampling, flexible small-batch production and scalable mass production
• Full safety and transport certifications: UN38.3, IEC62133, UL, CE, MSDS
• Comprehensive OEM / ODM engineering support covering batteries for LED lights,
  portable devices and other portable detection equipment.

Whether you are upgrading an existing LED under-cabinet light or designing a brand-new
motion sensor light strip, PKNERGY can help you select the right cell, optimize the pack structure
and shorten your time-to-market.

FAQ: Battery for LED Under-Cabinet Lights