Glossary

Absorbent Glass MatAcidAcid PackAcid StratificationActive MaterialAdvanced Flooded BatteryAlloyAmmeterAmp-HourAmpereAverage DrainBackfire ProtectionBackup BatteryBalancingBatteryBattery CareBattery CaseBattery CategoriesBattery HydrometerBoost ChargingCalcium BatteryCapacityCarbon AdditiveCellCell Short-CircuitCharge RegulatorChargerChargingCharging VoltageCircuitClosed BatteryCold Cranking Amps (CCA)Constant Current Battery ChargerConstant Current DischargerConstant-Voltage Battery-ChargerContinous TestCorrosionCurrentCurrent CollectorCutoff VoltageCycleCycle LifeCyclic LoadsCyclingCylindrical BatteryDamage due to Long Down-TimesDeep DischargeDeep-Cycle BatteryDegassingDepth of DischargeDirect CurrentDischarge RateDischargingDistilled WaterDouble LidDry-ChargedElectrolysisElectrolyteEnd of Charging VoltageEnhanced Flooded BatteryExpanded Metall GridFill LevelFlat PlateFloat ChargeFlooded BatteryFuseGas Recombinant TechnologyGassingGel BatteryGlass MatGridGroundGround CableHVTHybrid BatteryImmobilized ElectrolyteInternal ResistanceIonLead SedimentsLead SulfateLead-Acid BatteryLithium Iron Phosphate BatteryLithium-Ion BatteryLoadLow-MaintenanceM.A.S.S.MaintenanceMaintenance-FreeMemory EffectMultimeterNegative (-)Negative (-) PlateNominal VoltageNon-SpillableOpen Circuit VoltageOpen-Circuit VoltageOverchargingParallel CircuitPlacement of TerminalsPlatePlate PackPlate SetPolarityPole GreasePositive (+)Positive (+) PlatePrimary BatteryPulse ChargePure Lead BatteryRapid-Charge BatteryRecycling EffiencyResistorReversed PolaritySLI BatterySafety ReserveSealSealed Maintenance-FreeSecondary BatterySelf-DischargeSelf-Discharge RateSeparatorSeries CircuitSeries/Parallel CircuitService LifeShock-ResistantShort CircuitSilent LoadsSilverSmart ChargerSpacerSpecific GravityStandbyStart-Light-IgnitionState of ChargeStationary BatterySulfatingSuper-Heavy Duty BatterySupply BatteryTemperature Cut-offTerminalTerminal BridgeTerminal Pole TypeTerminal VoltageTraction BatteryTubular PlateUninterrupted Power SupplyUnwanted ResistanceValve-Regulated Lead-Acid BatteryVent CapVented BatteryVenting HoseVibrationVoltVoltageVoltmeterWattWatt-HourWet ChargedZinc-Air Cellkey-off drain
Absorbent Glass Mat

Battery class in which the electrolyte is bound in a glass fibre mat separator.

Because the electrolyte is fixed, an AGM battery cannot leak. It is also vibration-resistant because the separators swell after they have absorbed the electrolyte, thus protecting the grid plates from vibration and material loss. Extremely vibration-resistant heavy-duty batteries are often based on advanced AGM technology.

In addition, because the glass fiber mats lie close to the electrodes, less active electrode material is lost during each discharge-charge cycle than in conventional batteries.

AGM batteries are used in cyclical and stationary applications such as telecommunications, wheelchairs, alarm systems as well as in classic starter applications and start-stop applications.

If your car with start-stop technologies had an AGM installed, you should definitely replace it with an AGM start-stop battery. An upgrade from EFB technology to AGM is always possible. Both start-stop batteries must be registered in the car's management system after installation.

AGM