Frequently Asked Questions

A C-rate defines how quickly a battery is discharged relative to its rated capacity: C20 means full discharge over 20 hours, C10 over 10 hours. Higher discharge currents reduce the usable capacity available. If your application discharges the battery faster than the rate shown on the datasheet, runtime will be shorter than expected, this is normal operation, not a fault.

Suitability depends on more than voltage and capacity, it depends on application type (standby vs cyclic use), discharge current requirements, required runtime, operating temperature, charge method and charger compatibility, depth of discharge, and expected cycle frequency. Selecting a battery on Ah rating alone can result in reduced performance or shortened lifespan.

Yes. Lithium batteries require a Battery Management System (BMS) to protect against overcharge and over-discharge, prevent overcurrent conditions, monitor cell balance and temperature, and safely disconnect the battery if limits are exceeded. If a BMS disconnects the battery, the system may appear to shut down even though the battery itself is not faulty.

Temperature has a major impact on both capacity and lifespan. Low temperatures reduce available capacity; high temperatures increase capacity short-term but significantly shorten battery life. Datasheet capacities are typically quoted at 25°C, so operation outside this range will change real-world performance.

Most lead-acid batteries use the Constant Current/Constant Voltage (CCCV) method: a controlled current during the bulk phase, a voltage limit during absorption, and a lower float voltage for standby operation. Always use the charging parameters specified in the corresponding datasheet for the specific battery.

To assess suitability accurately, provide the application type, load current or power requirement, required runtime, operating temperature, charging system details, and installation configuration (series/parallel). This reduces the risk of misapplication and allows an accurate recommendation.

A mismatch doesn't necessarily indicate a battery fault. First check discharge current against the datasheet rate, operating temperature, charging voltage and method, installation quality and cabling, and battery age and usage history. If concerns remain, technical support can review the application against datasheet assumptions.

Before switching to lithium, confirm charger and inverter voltage compatibility, charge algorithm suitability (bulk/absorption/float settings), maximum charge and discharge current limits, system cut-off voltages, and whether the lithium battery includes a Battery Management System (BMS). Incompatible charging or protection settings can cause reduced performance or system shutdown.

Cycle use and standby use describe two different battery duty cycles. Cycle use covers batteries that are regularly charged and discharged as the primary power source, such as motorbikes or portable equipment. Standby use covers batteries kept on float charge as a back-up, only discharging during a power cut or supply drop.

No. Deep-cycle batteries do not suffer from memory effect the way NiCd batteries can. Their capacity does gradually reduce over time through normal ageing, but this is unrelated to partial-charge memory.

This is dependent upon the battery series; they will require different methods for checking a battery's performance.

Regular battery examinations can interpret irregularities within the batteries themselves but also the charging systems. The method used to examine the electrochemistry of the battery is done through inspection of the electrolytes within the cell. Interpretation can be done through voltage readings.

Overcharging is possibly the worst element for a battery. It is believed that the battery charger is responsible, but this is not the case and this could cause destruction to the workings of the charger. The automatic circuits within the chargers are sensitive to a number of things, which can include: heat, direct contact with sunlight and both indirect and direct contact with electromagnetic influences, which can fail or shift the calibration of the charger. If they fail, the overcharging can affect the life of a battery. During overcharging, this can displace the currents within a battery causing oxidization, thus removing water from the electrolytes within the battery. Once removed, this is no longer active within the battery itself this will then make the battery itself become inactive. Sealed batteries are not exempt from the same problems if overcharged. In fact sealed batteries are particularly sensitive to overcharging. Unfortunately once moisture is removed from the battery; it is not possible to replace the liquid lost. Sections of the battery can sustain damage through overcharging this means that the undamaged section of any can be used and recycled if detected early enough. If overcharging occurs, correct immediately.

Over discharging can be a problem which can originate from insufficient battery capacity which can cause the battery to be overworked. Discharges greater than half the capacity of a cell can shorten life cycle of a battery without increasing the depth of the cycle life. Inadequate complete charging can cause symptoms of over-discharging. These are called Sulphation. This can cause a loss of battery capacity and an unusually low specific gravity. Sulphation is when sulphur from the electrolyte within the battery comes in contact with lead on the plates and in turn this forms a compound called lead-sulphate. If this condition becomes chronic, certain battery chargers will not remove the hardened sulphate. Sulphation can be removed by using a proper de-sulphation charge with manual chargers. To get this result the flooded batteries must have a charge within the parameters of 6 to 10 amps at 2.5 volts per cell this will then return them to their specific gravity rate. AGM batteries which are sealed should be brought up to 2.35 volts and then discharged to a rate of 1.75 volts per cell. This is to be repeated until the capacity of the battery has returned. Charging alternators and float battery chargers are automatic which means it can taper the rate at which the battery charges at.

Lead-acid batteries are rated by their capacity (Ah) over a defined discharge period, such as C10 or C20. This rating reflects how much charge the battery can deliver over that specific timeframe, rather than a single, universal capacity figure.

Battery lifespan varies significantly depending on how it's charged, the temperature it operates at, depth of discharge, and cycle frequency. There is no single fixed lifespan figure, it depends on how the battery is used and maintained.

VRLA battery life is determined primarily by three factors: operating temperature, discharge rate, and the number of charge/discharge cycles undertaken. Higher temperatures and deeper, more frequent cycling both reduce service life.

Deep-cycle batteries suit applications where more than half the battery's capacity is used in each cycle. Common examples include electric vehicles, golf carts, mobility devices, and solar power systems.

Yes. Float applications keep the battery on constant charge with only occasional discharge, such as emergency back-up systems. Cycle applications charge and discharge the battery regularly as part of normal operation, such as electric vehicles or renewable energy storage.