The above-mentioned item is a high-quality, compatible battery for your Q40. It is an excellent replacement battery for your existing or defective Q40. It can also serve as an additional spare battery for on-the-go use. Handling and charging are as usual, hassle-free with the standard power supply or charger. A high level of safety is provided by the protective electronics against overcharging and short circuits. The use of high-quality cells allows for a greater number of charge-discharge cycles, which means a longer lifespan for your new Q40 battery. Quality is our top priority. This means that all batteries are new and unused. Our own quality assurance ensures a high standard of quality. Note: Unless we explicitly state that this is an original product, we supply a compatible product. This means it is in no way an original product from the manufacturer and is therefore not produced or recommended by them. All brand and product names are the property of their respective owners and are only used for compatibility description.