The above article is a high-quality, compatible battery for your Precision 5520. It is ideal as a replacement battery for your existing or defective Precision 5520. It can also be used as an additional replacement battery when travelling. It is easy to handle and charge as usual with the standard mains adapter/charger. The electronic protection against overcharging and short circuits offers you a high degree of safety. By using high-quality cells, a higher number of charge-discharge cycles can be achieved. This means a longer service life for your new Precision 5520 battery. Quality is our top priority. This means that all batteries are new and unused. Our own quality assurance guarantees a high standard of quality. Note: If we do not explicitly state that this is an original product, we are supplying a compatible product. This means that it is not an original product from the manufacturer and is therefore not manufactured or recommended by the manufacturer. All brand and product names belong to their respective owners and are only used to describe compatibility.