The above-mentioned item is a high-quality, compatible battery for your 6600. It is an excellent replacement battery for your existing or defective 6600. 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, resulting in a longer lifespan for your new 6600 battery. Quality is our top priority. This means 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 provide a compatible product. This means it is not an original product from the manufacturer and is therefore not produced or recommended by them. All brand and product names belong to their respective owners and are only used for compatibility description.