Call to check. Famous brand products generally have anti-counterfeiting labels, especially for well-known Chinese trademark brands like Varta batteries. Each battery has an anti-counterfeiting label. Just scratch off the anti-counterfeiting code and call to check. Counterfeit goods generally do not have anti-counterfeiting labels or cannot be contacted by phone. It should be noted that the anti-counterfeiting code can only be checked by calling once. If the authentic anti-counterfeiting code is called for the second time, it will be fake.