Dry Lead Acid Battery

NP4-6 (6V4Ah/20hr)  The rechargeable batteries are lead-lead dioxide systems. The dilute sulfuric acid electrolyte is absorbed by separators and thus immobilized. Should the battery be accidentally overcharged producing bydrogen and oxygen, Special one-way valves allow the gases to escape thus avoiding excessive pressure build-up. Otherwise, the battery is completely sealed and is, therefore, maintenance-free, leak proof and usable in any position.Battery ConstructionComponentPositive plateNegative plateContainerCoverSafety ValveTerminalSeparatorElectrolyteRaw materialLead DioxideLeadABSABSRubberCopperFiberglassSulfuric AcidGeneral Feature●Absorbent Glass Mat(AGM) technology for efficient gas recombination of up to 99% and freedom from electrolyte maintenance or water adding.●Not restricted for air transport-complies with IATA/ICAO Special Provision A67.●UL-recognized component.●Can be mounted in any orientation. Computer designed lead, calcium tin alloy grid for high power density.●Long service life, float or cyclic applications.●Maintenance-free operation.●Low self discharge.SPECIFICATIONNominal voltage----------------------6VNumber of cell ----------------------- 3Length(mm/inch)----------------------- 70/2.76Width(mm/inch) --------------------------- 47/1.85Height(mm/inch)--------------------------- 101/3.98Total Height(mm/inch) ------------------- 107/4.21Approx. Weight(kg/lbs) ------------------ 0.64/1.41Performance CharacteristicsCapacity77°F(25℃)20 hour rate (0.225A, 5.25V )4.0Ah10 hour rate (0.44A, 5.25V)3.4Ah5 hour rate (0.82A, 5.25V)3.1Ah1 hour rate (2.9A, 4.8V)2.9AhInternal ResistanceFull charged Battery 77°F(25℃): 25mΩCapacity affected byTemperature(20hour rate)104℉ (40℃)102%77 ℉ (25℃)100%32 ℉ (10℃)85%5 ℉  (-15℃)65%Self-discharge68℉ (20℃)Capacity after 3 months storage90%Capacity after 6 months storage80%Capacity after 12 months storage60%Max. discharge current77℉(25℃): 67.5A(5S)Charge(ConstantVoltage)Float: 6.8~6.9V / 77℉(25℃)Cycle: 7.25~7.45V / 77℉(25℃)Max. Current：1.13ADischarge Constant Current (Amperes at 77℉ 25℃)End Point Vlots/Cell5min10min15min30min1h3h5h10h20h1.60V16.311.39.174.942.901.300.880.470.2388881.65V15.510.88.784.762.801.250.870.460.2341.70V14.510.48.344.532.701.200.850.450.2301.75V13.79.877.884.362.601.150.820.440.2251.80V12.89.277.424.072.501.100.790.430.220Discharge Constant Power (Watts at 77℉ 25℃)End Point Vlots/Cell5min10min15min30min45min1h2h3h5h1.60V32.722.918.19.797.865.493.502.521.611.65V30.621.517.19.307.505.263.392.461.591.70V28.520.216.28.807.135.023.282.401.561.75V26.618.815.18.286.744.773.152.331.511.80V24.617.614.17.776.344.513.022.251.48