Why High-Power Banks Use Multiple Cells
To reach 60W–140W safely, power banks must use:
- Multiple cells in series and parallel
- High-current capable battery packs
This creates a new challenge: cell imbalance.
This article is part of the Power Bank Knowledge Hub and supports the High-Power Power Banks: A Complete Technical Guide.
What Happens Without Balancing?
When cells drift apart:
- Some cells overwork
- Heat increases unevenly
- Capacity shrinks faster
- Safety margin decreases
At high power, imbalance accelerates failure.
Passive vs Active Balancing
Passive balancing:
- Burns excess energy as heat
- Slow and inefficient
Active balancing:
- Transfers energy between cells
- Maintains uniform performance
- Reduces stress and heat
For high-power applications, active balancing is no longer optional.
Why Active Balancing Improves Reliability
Benefits include:
- Longer cycle life
- More stable output
- Improved thermal behavior
- Higher long-term safety
This is especially critical for products exceeding 100W.
Reachinno’s Engineering Practice
Reachinno high-power platforms integrate active balancing into the BMS design to ensure:
- Consistent cell behavior
- Controlled temperature rise
- Predictable long-term performance
Knowledge Hub Reference
This article is part of Reachinno’s Power Bank Knowledge Hub.
➡️ Read the full pillar article: High-Power Power Banks Explained
