Basic InfoModel NO.:?BN4815LYType: BatteryUsage:UPS, Electric Power, Lighting, RailwayNominal Voltage:48VDischarge Rate:Ultrahigh Discharge RateShape:Square BatteryElectrolyte:AlkalineInstallation:FixedRechargeable:ChargeableTrademark:CHILWEEFEATURES:1.Modularized design and pefectly compatible to existing electric bicycles2.Green " and environment-friendly, no pollution to the environment during production and normal usage3.Stable structure and simplified production process enables mass production and easy maintenance4.Completely new protection design of water-proof, fire-proof, shock-resistance enable high safety5.Professional protection module and BMS ensures the battery pack to be protected perfectly6.High weight and measurement specific energy ensures the battery pack extremely long-voyage ability7.Super long life supported by innovative technologies, high quality material and strict manufacturing controlSPECIFICATION:Battery Model No.:BN4815LYMaterial:MnNiCo Ternary Material + LiMn2O4Nominal Voltage (V):48VNominal Capacity (C2, 25℃ ):15AhBattery Pack Dimension (mm):275mm X 150mm X 80mm (L X W X H)Nominal Weight (Kg):4.5Kgs ± 0.1Charge Limited Voltage (V): 54.6VContinuous Charge Current (A):3AMaximum Charge Current (A):7.5ACharging Mode (Constant Current/Constant Voltage):3A X 6.5hDischarge Cut-off Voltage (V):≥ 39VContinuous Discharge Current (A):≤ 15AMaximum Continuous Discharge Current (A):≤ 18ACycle Life at 100% D.O.D.:≥ 800 CyclesCharge Port / Discharge Port:Banana Plug / Banana PlugCapacity Retention Rate at 0℃:≥ 90%Self-Discharge Rate (25℃):≤ 3% per monthBattery Pack Operation Instruction:1) After fully charging of the battery pack, the battery pack shall be installed in the frame of the electric bike.2) The position of "+/-" polarity of the discharge terminal port at each electric bicycle is different, so please check and?confirm the position of the polarity before connecting the battery pack to the electric bicycle.3) Turn on the battery power lock (turn your Key to "On" position). Check if the bicycle's power indicator is normal,?if it is normal, run it normally. If there is anything abnormal, please contact your electric bicycle dealer for technical?resolution.4) Lithium Ion battery is environment-friendly and smart battery, and there is no "Memory Effect". So lithium ionbattery can be recharged at any SOC (stage of charge) without any damages to the battery. During the charging,plug-in the charger's charging port to the battery pack's charging port, and charging can be stopped when thecharger indicator turns to green.5) The optimum charging method of lithium ion battery is to recharge the battery pack at the time when the batterypack's capacity has not yet been discharged fully. In case the battery pack's capacity has been discharged 100%,?the battery pack must be recharged within 48 hours, or else the battery pack may be permanently damaged?because BMS system also comsumes electricity from battery pack which cause serious overdischarge to the?battery pack.Product Description http://www.chilweebattery.com/m...le-battery-bn4815ly.html