Portable Backup Battery

NP4.5-4(4V4.5Ah/20hr)TThe 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----------------------4VNumber of cell ----------------------- 2Length(mm/inch)----------------------- 47/1.85Width(mm/inch) --------------------------- 47/1.85Height(mm/inch)--------------------------- 102/4.02Total Height(mm/inch) ------------------- 108/4.25Approx. Weight(kg/lbs) ------------------ 0.5/1.11Performance CharacteristicsCapacity77°F(25℃)20 hour rate (0.225A, 3.5V )4.5Ah10 hour rate (0.43A, 3.5V)4.3Ah5 hour rate (0.78A, 3.5V)3.9Ah1 hour rate (2.8A, 3.2V)2.8AhInternal 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℃): 18A(5S)Charge(ConstantVoltage)Float: 4.54~4.60V / 77℉(25℃)Cycle: 4.85~4.90V / 77℉(25℃)Max. Current：1.13ADischarge Constant Current (Amperes at 77℉ 25℃)End Point Vlots/Cell5min10min15min30min1h3h5h10h20h1.60V15.811.08.904.902.801.250.870.4660.23331.65V15.010.58.524.622.701.200.840.450.2311.70V14.110.18.104.402.601.150.810.440.2281.75V13.39.587.654.422.501.100.780.430.2251.80V12.49.007.203.952.401.050.750.420.221Discharge Constant Power (Watts at 77℉ 25℃)End Point Vlots/Cell5min10min15min30min45min1h2h3h5h1.60V29.019.416.19.427.345.553.542.531.821.65V27.218.315.38.947.005.313.432.461.791.70V25.417.114.48.466.355.073.312.391.751.75V23.616.013.57.966.294.813.182.321.721.80V21.814.812.57.465.924.553.042.241.67(Note)The above characteristics data are average values obtained within three charge/discharge cycles not the minimum values.