Battery Cycle Life Calculator
Estimate a LiFePO4 power station battery's remaining capacity and years of life left based on its rated cycle life and how often you recharge it.
Most LiFePO4 (LFP) portable power stations are rated for roughly 2,500-4,000 full charge cycles before capacity falls to about 80% of original — check your specific model's spec sheet for its exact rating, as it varies by brand.
Estimated remaining capacity
98.6%
Cycles used so far
208
Cycles remaining to 80%
2792
Estimated years remaining
26.8
This uses a simple straight-line approximation between 100% capacity (new) and 80% capacity (the rated cycle-life threshold) — real degradation isn't perfectly linear, and factors like heat, deep discharges, and long-term storage at a full or empty charge can accelerate wear beyond this estimate. A battery isn't “dead” at 80% capacity either — that threshold is just the point manufacturers commonly rate to, and most batteries keep working well past it with gradually reduced capacity.
How the Battery Cycle Life Calculator works
Enter your power station's rated cycle life (check its spec sheet — most LiFePO4 models cite roughly 2,500-4,000 cycles to 80% capacity), how often you fully recharge it, and how many years you've owned it — the calculator estimates your battery's current remaining capacity and roughly how many years of useful life remain.
The estimate uses a simple straight-line approximation between 100% and the 80% rated threshold, which is a reasonable planning simplification even though real-world degradation isn't perfectly linear.
Frequently asked questions
What does "rated to 80% capacity" actually mean?
Manufacturers commonly rate a battery's cycle life as the number of full charge cycles it can handle before its maximum capacity drops to about 80% of its original, brand-new capacity — it's an industry-standard threshold for comparison, not a point where the battery stops working; it keeps functioning with gradually reduced capacity well beyond that.
What counts as one full charge cycle?
One full cycle is one complete discharge-and-recharge equivalent to 100% of capacity — charging from 50% to 100% twice, for example, adds up to one full cycle, not two, since the total energy moved equals one full charge.
Does how I use or store the battery affect its actual lifespan?
Yes, meaningfully — consistently running a battery down to fully empty, storing it at a full charge for long periods, or exposing it to high heat can all accelerate capacity loss beyond what a simple cycle count predicts, while storing it partially charged in a cool place when not in use tends to preserve capacity longer.