After three years running both battery types in field operations, here's what I've observed with actual amp-hour measurements. Bioenno 20Ah LiFePO4: Consistently delivers 18.5Ah usable at 50% duty cycle SSB, maintains voltage under 100W load. Weight: 5.1 lbs. Odyssey PC925 AGM 28Ah: Delivers 14Ah usable to 11.8V cutoff, noticeable voltage sag above 75W. Weight: 18.2 lbs.

• LiFePO4 advantage: 3.6x lighter, consistent voltage, deeper discharge capability
• AGM advantage: $180 vs $420 cost, no BMS failure risk, cold weather performance

Both handle Field Day abuse well, but the weight difference is game-changing for portable ops. Anyone seeing different results with other brands?

Great data! I'm seeing similar results with Dakota Lithium vs Deka AGM. The LiFePO4 really shines in contest situations where you're running higher power consistently. The flat discharge curve means your finals stay happy throughout the entire operating session.

Your numbers align with my bench testing. One thing to add: charge time is dramatically different. The LiFePO4 accepts 10A charging safely, while AGM tops out around 4A for longevity. Critical for multi-day deployments with limited solar input.

Thanks for the real-world data! I've been hesitant to make the jump due to cost, but seeing the actual performance difference helps justify it. The weight alone would be worth it for my backpack portable operations.