Background

A customer from Eastern Europe manufactures portable electric equipment used for outdoor and construction applications. Their devices are designed to be operated in areas without reliable access to power outlets. The customer required a lightweight, durable, and high-discharge lithium battery solution to replace outdated sealed lead-acid batteries.

To improve performance, they decided to upgrade to a customized 18650-20P lithium battery pack.

Challenges

The customer needed a battery system that could meet the following requirements:

• Compact size with high energy density

• Continuous discharge performance for heavy loads

• Long cycle life

• Protection features for harsh outdoor environments

• Stable performance under fluctuating temperatures

Traditional lead-acid batteries failed to deliver required runtime and added unnecessary weight to the equipment.

Our Solution: 18650-20P Lithium Battery Pack

We designed and supplied a custom 18650-20P battery pack, configured using premium-grade cylindrical lithium cells.

Specifications

• Cell Type: 18650 Lithium-ion

• Configuration: 20 cells in parallel

• Nominal Voltage: 3.6V (or higher in series combinations depending on final pack)

• Capacity: Up to 20,000mAh (based on chosen cell model)

• Cycle Life: > 1,500 cycles

• BMS Integrated: Over-charge, over-discharge, over-current and short-circuit protection

• Temperature Range: -10°C ~ 60°C

The pack was engineered with nickel strip welding, fire-resistant housing, and optional custom connectors compatible with the customer’s existing equipment.

Results & Benefits

Improved Runtime
Operating time increased by 60% compared to the previous sealed lead-acid battery.

Weight Reduction
The lithium pack weighed 70% less, improving portability and user experience.

Long Cycle Life
Expected service life exceeds 3 years, reducing replacement frequency.

Higher Reliability
Built-in BMS ensured stability under fluctuating load conditions.

Environmentally Friendly
Lithium cells eliminate hazardous lead chemicals and deliver energy-efficient performance.

Customer Feedback

The 18650-20P lithium pack gave our equipment the endurance and portability we needed. Our users are pleased with longer runtime and lighter weight. It’s a major upgrade for our product line.