How LMO Pouch loses capacity
LMO's weak point is manganese dissolution, which speeds up at elevated temperature and damages the anode. Packs that lived in hot climates without active cooling typically fade faster.
At about 145 Wh/kg and a nominal 3.8 V per cell, LMO Pouch sits in a specific trade-off between energy density and durability that shapes how it ages in service.
Finding the knee before it finds you
Fade often accelerates earlier than in LFP, which is why second-life warranties on LMO blends are kept short and conservative.
The practical test is trend rather than a single reading: a module whose resistance is rising faster than its neighbours is heading for the knee, even if its capacity still looks healthy today.
| Measured SOH | Grade | Typical route |
|---|---|---|
| 85% and above | A | Grid-tied or commercial storage |
| 75–85% | B | Telecom backup, solar buffering |
| 65–75% | C | Low-duty backup, short warranty |
| Below 65% | D | Discharge and refining |
Signals worth tracking in the field
Fleet telematics can flag packs that are ageing faster than the rest of the fleet long before they retire. Pairing that data with a bench test at retirement makes grading faster and pricing more accurate.
- Usable capacity at a standard rate and temperature
- DC internal resistance per module
- Impedance spectrum shape from EIS sweeps
- Self-discharge over a rest period
- Temperature history and fast-charge share