Recharger Reading Answers

Aug 20, 2025

Recharger Reading Answers contain 7 questions and belong to the assessment system of the IELTS General Reading test. Recharger Reading Answers must be answered within 10 minutes. In this IELTS reading section, question types include: Do the following statements agree with the information given in the text? Also, Recharger Reading Answers offers a comprehensive overview of battery chargers vary by type and use, with charging protocols tailored to battery chemistry, requiring careful monitoring to prevent overcharging, overheating, or damage, especially at high C-rates. To practice similar reading tests, candidates can refer to the IELTS Reading Practice Test section.

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Topic:

A battery charger, or recharger, is a device used to put energy into a secondary cell or rechargeable battery by forcing an electric current through it. The charging protocol relies on the size and type of the battery that is getting charged. Some battery types have high tolerance for overcharging (i.e., sustained charging after the battery has been fully charged) and can be recharged by connection to a constant voltage source or a continuous current source, depending on battery type.

Simple chargers of this type must be manually disconnected at the end of the charge cycle, and some battery types undeniably require, or may use, a timer to cut off charging current at some fixed time, approximately when charging is complete.

Other battery types cannot withstand over-charging, becoming damaged.

The charger may have temperature or voltage sensing circuits and a microprocessor controller to safely adjust the charging current and voltage determine the state of charge, and cut off at the end of charge. A trickle charger provides a relatively insignificant amount of current, only enough to counteract self-discharge of a battery that is idle for a long time. Some battery types cannot abide trickle charging of any kind; attempts to do so may result in mutilation. Lithium-ion battery cells use a chemistry system which does not permit indefinite trickle charging. Slow battery chargers may take numerous hours to complete a charge. High-rate chargers may restore most capacity much faster, but high-rate chargers can be more than some battery types can tolerate. Such batteries require active monitoring of the battery to protect it from overcharging.

Electric vehicles typically need high-rate chargers. For public access, installation of such chargers and the distribution support for them is an issue in the proposed adoption of electric cars.

Charge and discharge rates are regularly given as C or C-rate, which is a measure of the rate at which a battery is charged or discharged relative to its capacity. The C-rate is defined as the charge or discharge current separated by the battery's capacity to store an electrical charge. While rarely stated explicitly, the unit of the C-rate is h', equivalent to stating the battery's capacity to store an electrical charge in unit hour times current in the same unit as the charge or discharge current.

The C-rate is on no occasion negative, so whether it describes a charging or discharging process depends on the context.

For example, for a battery with a capacity of 500 mAh, a discharge rate of 5000 mA (i.e., 5 A) corresponds to a C-rate of 10C, meaning that such a current can discharge 10 such batteries in one hour. Likewise, for the same battery a charge current of 250 mA corresponds to a C-rate of C/2, meaning that this current will upsurge the state of charge of this battery by 50% in one hour. Since the unit of the C-rate is characteristically implied, some care is required when using it to avoid confusing it with the battery's capacity to store a charge, which in the SI has unit coulomb with unit symbol C.

If both the (dis)charge current and the battery capacity in the C-rate ratio is multiplied by the battery voltage, the C-rate becomes a ratio of the (discharge power to the battery's energy capacity. For example, when the 100-kWh battery in a Tesla Model S P100D is undergoing supercharging al120 kW the C-rate is 1.2C and when that battery distributes its maximum power of 451 kW, its C rate is 4.51C.

All charging and discharging of batteries generate internal heat, and the amount of heat generated is roughly proportional to the current involved (a battery's current state of charge, condition, be history, etc. are also aspects). As some batteries reach their full charge, cooling may also be observed. Battery cells which have been built to allow advanced C-rates than usual must make provision for increased heating. But high C-ratings are attractive to end users because such batteries can be charged more quickly and yield higher current output in use. High C-rates typically require the charger to carefully monitor battery parameters such as terminal voltage and temperature to prevent overcharging and so damage to the cells. Such high charging rates are possible only with some battery types. Others will be damaged or perhaps overheat or catch fire. Some batteries may even explode. For example, an automobile SLI (starting, lighting, ignition) lead-acid battery carries numerous risks of explosion.

Question 1-7

Do the following statements agree with the information given in the Reading Passage?

TRUE - If the statement agrees with the information.

FALSE - If the statement contradicts the information.

NOT GIVEN - If there is no information on this.

1. The convention of charging depends on the dimension and category of battery being charged.

Answer: TRUE

Supporting statement: "The charging protocol relies on the size and type of the battery that is getting charged."

Keywords: charging protocol, size, type of battery

Keyword Location: Paragraph 1, Line 2

Explanation: The charging method varies based on the battery’s size and type, confirming the statement.

2. The life of a battery increases if its charging is cut by a timer as opposed to manually disconnecting it.

Answer: NOT GIVEN

Explanation: Although both timer and manual disconnection are mentioned, there’s no direct comparison regarding their effect on battery life.

3. All sort of batteries can compatibly work healthy with trickle chargers.

Answer: FALSE

Supporting statement: "Some battery types cannot abide trickle charging of any kind; attempts to do so may result in mutilation."

Keywords: cannot abide, trickle charging

Keyword Location: Paragraph 3, Line 3

Explanation: Not all batteries can handle trickle charging; it may damage certain types.

4. The C-rate is demarcated solitary for the battery's ability to

Answer: FALSE

Supporting statement: "The C-rate is defined as the charge or discharge current separated by the battery's capacity to store an electrical charge."

Keywords: charge/discharge current, capacity

Keyword Location: Paragraph 6

Explanation: The C-rate is not only defined for the battery's capacity—it is a ratio of current to capacity.

5. The C-rate becomes negative when discharging process takes

Answer: FALSE

Supporting statement: "The C-rate is on no occasion negative, so whether it describes a charging or discharging process depends on the context."

Keywords: C-rate, never negative

Keyword Location: Paragraph 6, Line 5

Explanation: It explicitly states that the C-rate is never negative.

6. The quantity of current involved is the lone factor contributing to the generation of heat while charging and discharging.

Answer: FALSE

Supporting statement: "The amount of heat generated is roughly proportional to the current involved (a battery's current state of charge, condition, be history, etc. are also aspects)."

Keywords: also aspects, state of charge, condition

Keyword Location: Final paragraph

Explanation: Current isn’t the only factor—other factors like charge state and condition also influence heat generation.

7. Batteries could detonate if overcharged.

Answer: TRUE

Supporting statement: "Such high charging rates are possible only with some battery types. Others will be damaged or perhaps overheat or catch fire. Some batteries may even explode."

Keywords: overcharge, overheat, explode

Keyword Location: Final paragraph

Explanation: Overcharging can lead to explosion in some batteries, confirming the statement.

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