Many lithium batteries say "Grade A cells" on the box. What does it mean? And can you trust it?
What a cell grade is
Battery cells come off a factory line. Each one is tested. They check:
- How much power it holds
- How well it charges and drains
- How close it is to the other cells
Cells that pass everything are Grade A. Cells that miss some targets are sold as Grade B or lower.
Side by side
| Grade A | Grade B | |
|---|---|---|
| Passed full tests | Yes | No, or partly |
| Capacity | As rated | May be lower |
| Cell-to-cell match | Close | Can vary |
| Life | Longest | Often shorter |
| Price | Higher | Lower |
Why matching matters
A battery is a team of cells. If one cell is weak, the whole battery stops when that cell is empty. A team of matched Grade A cells works together for years.
The "Grade A" sticker problem
Anyone can print "Grade A". To be sure:
- Ask who made the cells.
- Ask for the cell model.
- Ask for a test report if possible.
- Get a written warranty that covers capacity.
Our batteries
We supply LiFePO4 batteries built on Grade A cells and set them up to match your inverter, in Port Harcourt, Warri and Yenagoa.
