:: FAQ on rechargeable batteries
:: Questions on how to look
after rechargeable batteries
:: Questions on specific products
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of rechargeable batteries
:: Special questions
:: On the rechargeable
batteries FAQ
:: Rechargeable batteries
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Does quick-charging damage my battery?

What is cycling?

 

How long should I leave my rechargeable batteries in the charger?

How should I look after a rechargeable battery?

Frequently askedquestions

 

Can rechargeable batteries really manage 1000 times?

General questions concerning batteries and rechargeable batteries

In this section we will answer general questions concerning batteries and rechargeable batteries.


Can rechargeable batteries really manage 1000 times??

Yes. But mostly only under laboratory conditions that often cannot be achieved under normal conditions.

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How can I tell that my rechargeable battery will soon be flat?

That is no problem with devices with a charge state display, which most mobile phones have. However, without a charge state display there is no way to tell if you have reached the so-called device shutdown voltage at which your device ceases operation. Unlike ordinary batteries, rechargeable batteries give the same output over the entire discharge time, but then come "to the end" somewhat suddenly. It is therefore advisable to always have a second fully charged battery ready for use.

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Should the cells get hot when charging?

No. They may become warm, but not really hot. If they do get hot, they have either been overcharged or are defective. A good charger detects the sudden rise in temperature and switches itself off. A good charger for a mobile phone battery has a thermoswitch that turns off the charging function at around 70C and thus prevents overcharging and overheating.

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In what charging state are rechargeable batteries supplied?

Rechargeable batteries are in principle charged during production to be able to check if they are functioning properly. The battery loses its charge, depending on how much time elapses from the production of a cell until it is sold at the shop. The rechargeable battery must be charged before it is used for the first time. NiCd rechargeable batteries must first be discharged so that a memory effect does not arise.

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Does quick-charging damage my rechargeable battery?

No. Charging takes around 1-2 hours with a quick-charger, as opposed to more than 10 hours charging time for normal chargers. The relatively high current of the quick-charger requires an especially reliable form of switching off once the battery has been fully charged.

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By how much can rechargeable batteries discharge themselves?

As a rule, rechargeable batteries lose around 80% of their charge within three months. The speed of self-discharge depends on the temperature. The higher the temperature, the greater the amount of self-discharge over time.

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Is a rechargeable battery useless after deep-discharging?

Not necessarily. In many cases it can be brought back to life by "cycling" several times.

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Is the ambient temperature important when charging?

Yes. Ideally, batteries should be recharged at room temperature. We recommend maintaining a temperature range of 15C to 30C.

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Does a new rechargeable battery have its full capacity available at once?

No. A a new rechargeable battery only develops its full capacity after a few charge/discharge cycles.

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What is cycling?

Cycling is a sort of "cure" for the rechargeable battery: It is discharged and recharged again 2 or 3 times in a row. This restores its original capacity. We recommend regular cycling for the rechargeable batteries of all systems, and also for new rechargeable batteries whose storage time and state of charge is not known, cycling 2 or 3 times can be a good idea.

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