The above-mentioned item is a high-quality battery for your Dell Latitude 3390. It is an excellent replacement battery for your existing or defective Dell Latitude 3390 battery. It can also serve as an additional spare battery for on-the-go use. Handling and charging are as usual, easily done 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 Dell Latitude 3390 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 by no means 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 used solely for compatibility description.