I. Industrial/High-Power Smart Chargers   1) Shenzhen Chengdian Xinsheng Technology Co., Ltd. (Shenzhen Bao'an District) • Power: 30W～1800W, specializing in smart chargers for robots/AGVs/floor scrubbers/sweepers • Battery: Lead-acid, ternary lithium, lithium iron phosphate; IP67 waterproof, wide temperature range -20℃～+60℃ • Certifications: ISO9001, CE/FCC/RoHS; 2-year warranty, OEM/ODM customization • Suitable for: Industrial robots, cleaning equipment, outdoor lithium battery equipment   2) Shenzhen Hengjunfeng Technology Co., Ltd. (Shenzhen Bao'an Fuyong District) • 15 years of R&D and manufacturing experience in power supplies/chargers, specializing in stage lighting power supplies + smart chargers for cleaning/logistics equipment • Products: Chargers for floor scrubbers, sweepe...

1. Core Definitions and Differences in Battery String Count (Most Fundamental Difference) • 54.75V: This is the full-charge voltage of a 15-cell lithium iron phosphate battery pack, calculated from the full-charge voltage of a single lithium iron phosphate cell (3.65V × 15 = 54.75V), corresponding to a nominal battery pack voltage of approximately 48V (3.2V × 15). • 58.4V: This is the full-charge voltage of a 16-cell lithium iron phosphate battery pack, calculated similarly as 3.65V × 16 = 58.4V, corresponding to a nominal battery pack voltage of approximately 51.2V (3.2V × 16).   2. Differences in Charging Compatibility and Safety Characteristics • 54.75V: Requires a charger compatible with 15-cell lithium iron phosphate batteries. The charging mode must match the three-stage charging of lithium batteries (constant...