Xenotronix

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MHTX7

MHTX7 NiMH Battery Charger

Designed to charge up to twelve NiMH battery cells ranging from 500 mAh to 5000 mAh (5Ah).

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When Accuracy and Quality Count
The Optimizer

 

BATTERY SOLUTIONS THAT DELIVER

Xenotronix standard products include a complete line of high quality off-the-shelf chargers for Sealed Lead-Acid, Nickel Cadmium and Nickel Metal Hydride batteries.

 

“Quality products, quality engineering!” - Bob Smith, Battery Co.

Glossary for frequently used terms

Use the navigation links below to search for terms used in this site.

 

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C

 

C-Rate
Discharge or charge current, in amperes, expressed as a multiple of the rated capacity of the battery. For example, a C/20 (0.05C) discharge current for a cell rated at 20 Ah is: 20 Ah/20, or 1 A.

 

Capacity
A battery rating, expressed in ampere-hours, that describes the output capability as the product of discharge current and discharge time. This rating only applies under specific environmental conditions and at a specific discharge current. Environmental conditions are typically 20 or 25 °C (68 or 77 °F). For NiCd/NiMH batteries, the discharge current is typically that which will deplete the battery in 5 hours (5-hour rate). Depending upon the brand, valve regulated lead-acid batteries and deep-cycle flooded lead-acid batteries are typically rated based on the 10-hour or 20-hour discharge rate. Standard flooded lead-acid batteries are typically rated under another system altogether. When batteries are discharged at higher currents, their apparent capacity (current-time product) will be less.

 

Example: A 40 Ah lead-acid battery (rated at the 20-hour rate) is rated for a 2 A discharge to completely deplete it in 20 hours (2 A x 20 hours = 40 Ah). However, if discharged at 40A, the battery may last as little as 50% of the 1 hour calculated from the nominal capacity. Discharged at 0.5A, the battery may last longer than the 80 hours calculated from the nominal capacity.

 

Cell
The smallest, most basic electrochemical unit used to generate or store electrical energy. Groups of cells are interconnected to create batteries or battery packs. See Battery

 

Cell reversal
Reversing the polarity of a weak cell within a battery pack due to over-discharge.

 

Charge Rate
The current at which a battery is charged (C-Rate).

 

Charge Termination
A method of determining when a battery is full and ending charge. Methods include charge time, minimum current, maximum voltage, maximum temperature, negative-delta-V, dT/dt, and calculated amphours returned, among others.

 

Conditioning (break-in, reconditioning, rejuvenation)
A process that utilizes a series of heavy discharges and charges on a battery to assure optimum performance

 

Conducted Emissions
That electromagnetic interference (EMI) that is transmitted to other electronics by conduction through connecting cables. Conducted emissions are controlled by eliminating or minimizing the source, or by the use of filter circuits.

 

Constant Current
1) Charging method or stage in which a specific regulated current is supplied to the battery. As the battery charges, its voltage rises and the current does not vary significantly.

2) Discharging method in which a specific regulated current is drawn from the battery. As the battery is depleted, its voltage drops and the current does not vary significantly. Typically used for battery capacity analysis.

 

Constant Power
Charging method or stage in which a specific regulated power is supplied to the battery. As the battery charges, its voltage increases, while the current decreases proportionally to maintain the power setting.

 

Constant Resistance
Discharging method in which the battery is discharged through a fixed resistance. As the battery is depleted, its voltage drops and current also drops proportionally. Typically used to pre-discharge the battery as inexpensively as possible.

 

Constant Voltage
Charging method or stage in which a specific regulated voltage is supplied to the battery. The battery will draw all available current it can form the charger until that voltage is reached, at which point the current accepted by the battery lowers.

 

Cutoff Voltage
See Disconnect Voltage

 

Cycle
One sequence of charge and discharge.

 

Cycle Life
The number of cycles under specified conditions that are available from a rechargeable battery before it fails to meet specified performance criteria. Shallow discharges (less than 30%) increase cycle life at the cost of utilized battery capacity.

 

Cylindrical cell
The positive and negative plates of a battery cell that are rolled up and placed into a cylindrical container.