Cycle-life claims can look impressive, but the test conditions behind them matter. A 6000-cycle statement is only meaningful when depth of discharge, temperature and end-of-life capacity are understood.
For procurement, the goal is not to chase the largest number. The goal is to get a battery whose warranty, BMS settings and application fit the sales promise.
Ask what the cycle claim means
A cycle-life figure should state the depth of discharge and remaining capacity at end of life. Without those details, it is difficult to compare two suppliers fairly.
Thermal environment changes the result
Battery life is strongly affected by temperature. Outdoor cabinets, hot garages and poor ventilation can reduce practical life even when the cell chemistry is good.