Many notebook batteries from this manufacturer are identical in design, meaning they are 100% compatible. Therefore, if you did not receive the exact original number you ordered, it may be a compatible battery with a different original number that is functionally and qualitatively the same as the model you intended to order. The item mentioned above is a high-quality battery for your DELL 71R31. It is an excellent replacement battery for your existing or defective DELL 71R31 battery. It can also serve as an additional spare battery for on-the-go use. Handling and charging are as usual, easy 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 71R31 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 belong to their respective owners and are used only for compatibility description.