Battery Model: WD52H (Perfect swap for VFV59, KWFFN, GVD76, W57CV) [3]Energy Output: 52Wh / 7.4V (High-density cells for premium power efficiency) [1, 3]Battery Capacity: 6710mAh [3]Daily Backup: Tested to deliver 2.5 to 4 hours of active runtime per charge.Lifespan: Built with Grade-A cells designed to last 3 to 5 years (500+ charge cycles).Safety: Inbuilt overcharge, overheating, and short-circuit protection.