Portable Backup Battery - Shenzhen Leadhoo Battery Co.,ltd

Portable Backup Battery

PRICE: contract price
Shenzhen Leadhoo Battery Co.,ltd
Contact Person:
Sky Zhang

Product Description
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℃)102w ℉ (25℃)1002 ℉ (10℃)85%5 ℉  (-15℃)65%Self-discharge68℉ (20℃)Capacity after 3 months storage90
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