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Q: How long is my warranty period?

A: All of our products come with a two year warranty, provided that there are no visible external defects (e.g. forceful damage or a cable having been nibbled on by a pet). For consumables (batteries), defects are assumed to be caused by flawed production within the first six months only. The invoice serves as a proof of warranty. Please keep it safe.


Q: How do I find a suitable PSU for my laptop?

A: Every laptop has its designated energy input either on the computer’s bottom side or on the original PSU ("output"). Please compare one of these values with the specification on our website. If they match, please also take a closer look at the PSU plug to compare with the image and measurements in our product description. If you find them to be identical, our product is compatible.


Q: Where do I find my PSU’s output power?

A: On some PSU’s the output power is not directly stated. It can be easily calculated when multiplying output voltage by amperage (e.g. 90W = 19V x 4.74A).


Q: My PSU’s input voltage is 1.5A, but you offer 2.0A. Will it still work?

A: Having years of experience, we can guarantee you that a PSU’s specified input is irrelevant.


Q: My original PSU has an output power of 65W (19V x 3.42A). Can I still get a 90W PSU (19V x 4.74A)?

A: Yes. Every laptop computer has a power tolerance of approx. 40%. Choosing a 90W PSU should not cause any problems as long as voltages match. You should not use a 120W PSU, though.


Q: Why is the power cord so important?

A: The power cord’s quality is considerably more important than the PSU itself. Capacitors may explode under some circumstances. In that case, the power circuit is supposed to break immediately, preventing further damage. With an inferior cord, a danger of fire is quite real. Therefore, please make sure to only get VDE (Association for Electrical, Electronic and Informtion Technologies e.V. )certified power cords. Learn more here:


Q: When connecting a PSU I can hear a humming sound coming from my stereo speakers. Why is that?

A: This phenomenon is not caused by the PSU’s functionality, but by the power cord’s grounding wire found in 3-wire cables with Schuko plug. When plugging into an outlet, a circuit of your house’s power grid gets closed. Under adverse conditions, this may result in a low frequency noise from speakers connected to the same circuit - a so-called ground loop. To solve this problem, you can get either an inexpensive sheath current filter or a PSU with a 2-wire cord.


Q: My device is defective or I received the wrong product. How can I initiate an RMA?

A: Please contact us by email ( or phone (+49-511-89757508). Our competent team will gladly assist you. Please note that packages without a paid postage can only be accepted after previous consent.


Q: Where do I get an RMA form?

A: The RMA form is always included with your delivery. In case, you don’t have it anymore, you can download it here.


Q: How do refunds work?

A: When still within your period of revocation (for details please see here: Right of revocation), you may return the product at any time. Immediately after receiving the product, you will be refunded via the method of the original payment.


Q: By mistake I have paid twice. How do I get my money back?

A: Please contact us by email ( or phone (+49-511-89757508). Our competent team will gladly assist you.


Q: The PSU is incapable of charging my battery. Is it defective?

A: Provided that the PSU is suitable to deliver the power needed, the battery can definitely be charged. If it does not work, it could be that

  • the battery is either defective or exhausted. For more information, please see the next question’s answer.
  • the laptop is faulty. The charging electronics are located inside the laptop itself, not within the PSU. The PSU only serves to provide power.


To easily test the PSU, please remove the battery and connect the PSU. If the laptop is able to start, the PSU is working flawlessly.


Q: What do I have to keep in mind, when using laptop batteries?

A: For best results, please follow these instructions:


            1. Proper charging

·         A battery can only achieve its maximum capacity during its lifetime, if about 20 charging cycles have initially been completed (approx. 6% à 100% and 100% à 6%) without any short-term or quick discharge occurring in between.*

·        Ideally, the maximum capacity will drop to 85% after 500 charging cycles.

·         The battery should not remain unused for extended periods of time (max. 4 weeks). Should you own more than one battery you should use them interchangeably.

·         If your laptop is usually connected to an outlet, you should disconnect and use the battery at least once a week.

·         If a laptop is not in use, it should be disconnected from the outlet.

·         Charging/discharging cycles should always be completed.

·         When not using the battery for a longer time (still less than 4 weeks), it should be charged/discharged to about 30%-50% and stored in a safe and dry place. Storing when fully charged or completely discharged will lead to reduced capacity or even failure (exhaustion)

·         When charging, the battery must never be subjected to temperatures exceeding 45°C (113°F)


2. Operating conditions

·         Surrounding temperature

o    0°C – 45°C (when discharging)

o    0°C – 40°C (when charging)

o  -20°C - +50°C (when storing, max. 4 weeks) 

·         Humidity

o    45% - 85% (when using)

       o    10% - 85% (when storing) 

3. Running time

Battery running time varies depending on the components connected to the laptop (for example, external drive, printer, optical mouse, etc.), the settings (such as brightness, power saving options, volume, hard drive, memory, etc.), and the running programs or games. That is why no manufacturer can guarantee a certain running time.

4. Safety instructions

·         Keep battery away from fire

·         Do not expose to liquids

·         Do not try to disassemble or modify

·         Do not subject to impacts

·         Do not expose to temperatures exceeding 60°C.

·         Do not leave in a sun-exposed, parked car.


5. Self-discharge of battery

Please note that a battery will slowly discharge even when not in use. This self-discharge is considerably higher in a battery plugged into the laptop, as opposed to one stored separately. Therefore please remove the battery when not using the laptop for more than one week.




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