Battery Lifespan & Usable Charge Cycle
When operating at 50% capacity load, rechargeable external batteries will generally last longer (in terms of lifespan and usable charge cycles) under constant recharge and simultaneous discharge (also called pass-through charging or trickle usage) rather than full charge and full discharge cycles. Here's why: --- Comparison: 1. Constant Recharge + Simultaneous Discharge (Partial Cycles): Smaller Depth of Discharge (DoD): Battery is only partially discharged before being recharged, which reduces wear on the battery cells. Reduced Heat Build-Up: Discharging and charging slowly generates less heat compared to deep cycles. More Charge Cycles: Lithium-ion batteries degrade less with shallow cycles. For example: 1000+ cycles at 20% DoD ~500 cycles at 80–100% DoD Lifespan Friendly: Ideal for stationary or semi-stationary use (like UPS or solar buffer systems). 2. Complete Charge → Full Discharge (Deep Cycles): Higher Depth of Discharge: Drains most of the battery before recharge, which ca...