Frequently asked questions / FAQ

We are aware that batteries, rechargeable batteries, flashlights, and chargers are products you do not really want to spend time to study in detail. You simply want to buy them in an easy and convenient manner as quickly as possible, when you need them. They should be reasonably priced, and perform as long as possible.

However, batteries, flashlights, and chargers are also technically highly complex products. Because it is important to us to provide you with help and advice, we collected frequently asked questions, and accompanied them with answers as brief as possible.

Please let us know, when you have further questions- we will gladly give you advice!


Alkaline batteries are particularly suitable for rarely used devices, or devices with a low but constant power consumption over a long periods. Because alkaline batteries – unlike rechargeable batteries – can be stored, or installed for a very long time virtually without any self-discharge, making them the perfect choice for remote controls, clocks, or flashlights.

Lithium battereis are cells which provide the highest energy and the longest service and or shelf life. They can be operated within a temperature range of about –20°C to 60°C. We guarantee a shelflife of up to 10 years for our tecxus™ lithium batteries.

No, because this will significantly reduce the overall performance. The reason for this is that a partially discharged battery will draw energy from the new battery leading to a shorter service life. Therefore you should always use batteries of the same age and capacity in a device.

No. Because NiCD batteries include the polluting and toxic heavy metal cadmium. The European Parliament issued a directive concerning these cells in 2006. It has interdicted the sale of batteries with a share of over 0,002% cadmium within the EU, starting of December 2009. We already took all NiCD batteries out of our product range in February 2009.

They offer up to 40% more run time per volume than NiCd. They are also environmentally friendlier. The biggest advantage of NiMH over NiCd is their ability to accept a charge at any time without suffering any “memory effect”. The best way to charge NiMH batteries is with a Delta V terminating charger, for example the tecxus™ TC 6000 family.

This describes a decrease in capacity of NiCd rechargeable batteries, when they are recharged before being completely discharged. Due to electro-chemical reasons the rechargeable battery will lose exactly the amount of energy which was remaining at the time of recharging (the rechargeable battery “memorizes” the most recent charge level, therefore the term memory is used). Rechargeable batteries with Memory Effect cannot be regenerated; repeated charging while residual charge remains can increase Memory Effect and will lead ultimately to total failure of the rechargeable battery. Occasionally, a similar effect, called Lazy Battery Effect may occur with NiMH rechargeable batteries under certain conditions, however, this effect can be reversed completely by completely discharging and recharging 2-3 times.

Yes. But usually only under laboratory conditions, as environmental influences, such as exposure to heat, will have a detrimental effect.

Yes, NiMH rechargeable batteries should be charged before being used for the first time. It may also be necessary regenerate rechargeable batteries from time to time, especially when cells have been stored over a longer period of time, it is recommended to perform several charging/discharging cycles (10, or more).

The basic principle is: The gentler the charging procedure is, the higher the useable capacity and the longer the lifetime of rechargeable batteries. Although high charging currents which in turn cause short charging times are in the interests of consumers, it will be at the expense of the performance and service life of rechargeable batteries. High charging currents can accelerate the aging process of a rechargeable battery. For gentle charging we recommend tecxus™ chargers TC 1000 LCD, TC 3000 travel, or TC 6000 family.

When you will not use your rechargeable batteries for a period of several months, they should be stored in a dry, clean and cool location. During storage for long periods of time, NiCd, NiMH, and Li-ion rechargeable batteries will continue to self-discharge.

No, you should only use rechargeable batteries with identical capacities in your devices.

Yes. High temperatures should be avoided. When rechargeable batteries are subjected to an average temperature of 35°C with a maximum temperature of 50°C for over a year, then the lifespan of a rechargeable battery may be reduced by as much as 50%. Never throw rechargeable batteries into a fire, or expose to direct sunlight, as this may cause an increase in the interior pressure resulting in a pressure build-up and subsequent explosion.

No. Moisture can cause the contacts to corrode, resulting in a high contact resistance which has an impact on the performance, or may even result in permanent damage to the rechargeable battery. Storage and transport should take place in a dry environment and cells showing signs of rust should be disposed.

Rechargeable batteries should not be subjected to strong mechanical impacts. This includes being dropped onto a hard surface and may cause leakage of electrolyte (“white powdery substance”), or the cell may even explode. Moreover, use of rechargeable batteries showing visible damage, like deformation, or being detected as faulty by a charger should be disposed of immediately.

Never! The batteries are under pressure. The electrolyte contained is caustic and may cause severe burn injuries when dispersed in an explosion.

In general, no. Accidental contact between the two terminals of rechargeable batteries may allow high current flow (short circuit) which may result in leakage of the cell, generate strong heat and ultimately may lead to cell explodes. Therefore, loose rechargeable batteries should never be transported in a pocket or bag together with coins, keys and other metallic items. For the purpose of transporting batteries, special storage cases are available.

To optain best performance, rechargeable batteries and the charger used should be well matched. Also, the charger should be suitable for the battery type used (NiMH, NiCd). Best results are achieved by use of low charging currents. Some rechargeable batteries may never reach their full performance in so-called quick chargers. In some cases, high charging currents may even damage the rechargeable battery.

Theoretically, this is possible. Overcharging can cause permanent damage to rechargeable batteries. Therefore, chargers used should have proper safety features, such as detection of charge-termination voltage (-dV), temperature of the rechargeable battery, power off after a certain charging time, or switch to trickle charging. The intelligent chargers TC 1000 LCD, TC 3000 travel, and the TC 6000 family offer exactely these features to ensure best performance.

A rechargeable battery should never be completely discharged to a degree where cell voltage drops below 1.0 volt. In this case, some chargers detect the rechargeable battery as being defective, making charging impossible with the exception of some very expensive charging stations. Repeated total discharge will causes a decrease in the rechargeable battery’s performance, and also permanent damage. Total discharge is actually not possible during operation of commercially available devices, because they stop to function, when insufficient voltage is applied. However, it is possible in home-made circuits, when e.g. a resistor is used for discharge, or ordinary flashlights. Total discharge may also result from self-discharge of rechargeable batteries of a long period of storage.

Batteries and rechargeable batteries must not be disposed of in domestic waste! They contain substances harmful to health and environment, and they must be disposed of in special containers, or collection points provided for this purpose.

Give us a call, we will be glad to introduce our products to you.

Pillmannstraße 12
38112 Braunschweig

Phone: +49 (531) 21058-0