Battery Cycle Ratings: A Lab Promise, Not a Real-World Guarantee

Battery manufacturers specify cycle life under controlled laboratory conditions—full charge-discharge cycles at stable temperatures—but real-world operations (shallow charging, temperature swings, variable discharge depths) dramatically alter this number. Understanding two critical factors—how deeply you drain the battery on each use and heat exposure—is essential: shallow discharges dramatically extend battery life, while thermal stress degrades capacity regardless of usage. Fleet operators who overlook these variables risk unexpected battery failures and costly downtime, discovering that published ratings are irrelevant to their actual operating conditions.