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Motorcycle Batteries
Starter Batteries
Traction Batteries
Supply Batteries
Picture of intAct Bike-Power Classic

Reliable starting power at an excellent price.

Exchange recommendation for a broken flooded battery.

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Picture of intAct Bike-Power AGM

Cost-effective all-rounder with solid buffer

for seasonal and short distance use.

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Picture of intAct Bike-Power SLA

Ready-to-use all-rounder

with solid buffer for seasonal and short distance use.

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Picture of intAct Bike-Power GEL

Provides 30% more starting power

for modern motorcycles with many electrical consumers, including ABS.

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Picture of intAct Bike-Power GEL HVT-HD

Special starting power for high demands and heavy loads.

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Picture of intAct Bike-Power HVT

Extremely vibration-resistant design

for special requirements and high loads due to vibrations (such as Harleys).

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Picture of intAct Bike-Power Lithium

Small top-of-the-range powerhouse

perfect whenever every gram or centimeter matters.

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Picture of intAct Garden-Power

Especially for use in lawn tractors and ride-on mowers

with low self-discharge and extra vibration resistant.

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Odyssey Bike
Picture of Odyssey Bike

Enormous starting power with very high cycle stability

for particularly demanding bikes under almost all conditions.

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Picture of intAct Start-Power NG
Testsieger

Always start properly

for passenger cars (also Asia models) to super-shakeproof for trucks.

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Picture of intAct Start-Power
TestsiegerTestsieger

Top performance at a great price

for almost all passenger cars, coaches, trucks and agricultural machinery.

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Picture of intAct Race-Power

The powerful all-rounder

with good durability and excellent value for money.

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Picture of intAct Premium-Power
TestsiegerTestsieger

30% extra starting power

and fast loading for many consumers and short distance use.

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Picture of intAct Start-Stop-Power AGM
Testsieger

Start. Stop. Keep charging.

For taxis, medium and luxury class cars, SUVs and trucks with start-stop systems and micro-hybrids.

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Picture of intAct Start-Stop-Power EFB

Start. Stop. Keep charging.

For small and medium-sized cars with start-stop systems and micro-hybrids.

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Picture of intAct BackUp-Power

Support for the starter battery

as an additional power supply for consumers, also during start-up.

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Picture of intAct Oldtimer-Power
Testsieger

Starting power in retro look

with the latest battery technology and 80% hand-crafted.

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Picture of intAct US-Power

For American vehicles

High performance battery matched to U.S. dimensions and end-pole types.

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Forster Premium Starter
Picture of Forster Premium Starter

Permanent top starting performance
combined with enormous weight savings and full installation flexibility for up to 100,000 starts.

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Odyssey Batteries
Picture of Odyssey Starter

Extreme starting power at any time

even in winter. Tolerates long-term discharge to deep discharge.

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Optima Redtop
Picture of Optima Redtop

Highest starting performance

even with long downtimes. Perfect for emergency vehicles or generators.

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Picture of intAct Traktion-Power Deepcycle

More working hours, more flexibility
and high reliability even with irregular loading.

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Picture of intAct Traktion-Power Deepcycle AGM

Robust and enduring

AGM-based for high currents and deep charge cycles.

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Picture of intAct Traktion-Power

Proven and cost-conscious

with good high current properties in light cyclical use.

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Picture of intAct Traktion-Power PzS

For the heaviest load

Long service life due to armored plate structure, even in multi-layer use.

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Picture of intAct GEL-Power

Minimal maintenace during use

and as storage for renewable energies and supply in the demanding leisure sector.

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Odyssey Batteries
Picture of Odyssey Traction

Greater freedom of movement

and exceptional performance even with a partially charged battery.

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Optima Yellowtop
Picture of Optima Yellowtop

Long-term stable performance

during the entire unloading process paired with short charging times.

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Trojan Deep Cycle
Picture of Trojan Deep Cycle

More working hours, greater flexibility

and high reliability even with irregular charging.

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Picture of intAct Marine-Power

Cost-conscious marine battery
with good capacity absorption and high capacity reserves.

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Picture of intAct Marine-Power AGM

Robust marine battery
AGM-based for high currents and deep charge cycles.

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Picture of intAct Solar-Power AGM

Robust solar battery
AGM-based for high currents and deep charge cycles.

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Picture of intAct Solar-Power

Proven and cost-conscious

with good capacity absorption and high capacity reserves.

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Picture of intAct Traktion-Power PzS

For heavy cyclical use

also at fluctuating recharging. Provides permanently stable voltages.

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Picture of intAct Active-Power AGM

Professional all-rounder

in AGM design, sealed maintenance-free and with high vibration resistance.

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Picture of intAct Active-Power GEL

Maintenance-free and uncomplicated

for seasonal power-supply and as intermediate storage in smaller solar applications.

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Picture of intAct GEL-Power

Strong and maintenance-free

as storage for renewable energies and supply in the demanding recreational sector.

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Picture of intAct AGM-Power

Uncomplicated all-round talent

for hobby, leisure and smaller solar applications.

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Picture of intAct Block-Power

Ready for many uses

durable and powerful even in safety-relevant applications.

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Forster Premium
Picture of Forster Premium

Maximum capacity and lifetime
For use in camping, marine and as energy storage.

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Forster Fishing
Picture of Forster Fishing

Durable marine battery
Provides reliable and enduring power to fishing equipment.

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Forster Thermo Control
Picture of Forster Thermo Control

Durable performance in cold conditions
for installation in outdoor, non-heated areas.

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Forster Standard
Picture of Forster Standard

Durable with consistently strong performance
Maximum safety for normal to medium loads in caravan and marine applications.

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Forster Smart Power
Picture of Forster Smart Power

Versatile, powerful and affordable
The Smart Power series offers a LiFePO4 lithium supply battery with innovative frost protection management at an attractive price.

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Odyssey Batteries
Picture of Odyssey Supply

Stalwart + always powerfully prepared

for long-term supply as well as short peak-performance with extremely good charging behaviour.

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Optima Bluetop
Picture of Optima Bluetop

More cycles in maritime use

and for consumers in camping vehicles or buses.

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Trojan Deep Cycle
Picture of Trojan Deep Cycle

More working hours, more flexibility

and high sturdiness as a power-supply as well as a buffer.

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Glossary

ABCDEFGHIKLMNOPRSTUVWZ
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
Internal Resistance

A measurement to sum up all internal resistance in a battery.

Each voltage source has an internal resistance. In detail, the internal resistance is composed of the polarisation resistance of the electrochemical reaction (the energy required for the chemical process), the flow resistance of the ions and the ohmic resistance of the electrodes. The electrical equipment therefore does not receive the entire terminal voltage, as a part of it is lost in the internal resistance of the battery. If the current flow increases, the voltage drop at the internal resistance grows and the voltage decreases.