Thank you for viewing. Please read the profile. Please purchase after agreeing to the following. (Important) There are scratches and damage on the label. There is remaining corrosion on the board. The gold plating became thin after polishing the board corrosion. (Important) A new battery was installed, and I checked the operation multiple times on multiple playback devices for about a month before listing, but there were no battery deterioration or defects such as simple operation saves. However, this product does not have an operational guarantee. In my experience, there is a possibility that it will not work upon delivery. Please purchase only if you do not mind the above. Socket type, new battery replaced. This is a sale of the cassette only. With the socket type, you can replace the battery yourself when the battery runs out. I do not reuse images. The product in the description image will be delivered. Before shipping, I will replace the new battery and re-measure the voltage (new battery standard: approx. 3.10v to 3.30V) & perform a simple operation check & maintenance, and then ship. To prevent operational defects and incorrect contents, I have video recordings of the above work & packing and shipping. I will attach images of the pre-shipment inspection before and after shipping, so you can check them. Product Name: Defective Pokemon Blue Pocket Monsters Blue Game Boy Socket Type New Battery Replacement The cassette and label have (screw deterioration, terminal corrosion, scratches on the cassette, scratches on the label, dirt, sunburn, stains, discoloration, fading, deterioration, age-related deterioration, etc.). There is no box, case, instruction manual, or attachments, and it is a used item. Anonymous shipping. 100 yen discount from the second order for combined shipping. If the delivered product does not start or is difficult to start, please try inserting and removing the cassette several times, inserting it slightly shallowly (deeply), or inserting it slightly at an angle. There may be errors in the description. Everything is as shown in the images and the condition. This is a subjective inspection. Please refrain from purchasing if you are nervous or cannot understand retro used items. Startup and simple operation have been confirmed on multiple genuine playback devices. I will ship after maintenance, disinfection, and cleaning with ethanol, KURE contact spray & electronic cleaner, etc. If you purchase, you agree to the transaction terms. Management number 260106