Characteristics of lithium batteries: 1. Good stability and strong adaptability 2. Long lifespan, high performance and endurance 3. Green and environmentally friendly, pollution-free and noiseless 4. High cost-effectiveness and low maintenance costs Common types: 1. Accompanying robots 2. Service robots 3. Nursing robots Custom properties: model: RQY048-48V-27Ah Standard voltage: 48V Rated capacity: 27Ah Standard charging current: 25A Charging cut-off voltage: 3.65V Standard discharge current: ≤ 27A Discharge cut-off voltage: 2.6V Standard average charging time: about 1.2 hours Continuous discharge current: 25A Instantaneous peak discharge current: 40A (≤ 10s) Charging method: 54.75V25A lithium iron phosphate dedicated charger Working temperature (CC/CV): Charging 0 ℃ -55 ℃ Discharge -10 ℃ 55 ℃