Please read the profile. Please agree to the following before purchasing. Immediate purchase is OK. Socket type conversion or high-capacity (approx. 4x) CR2032 size soldered new battery replacement, 30-day operation guarantee. Please let us know your desired type after purchase. If we do not hear from you on the day of purchase, we will ship with the socket type conversion. With socket type conversion, you can replace the battery yourself when it runs out. Product Name: Cyborg Kuro-chan Devil Revival Game Boy Color High Capacity Approx. 4x 2032 Size Soldered or Socket Type New Battery Replacement 30-day Operation Guarantee Software only sale. This is a used item. The cartridge and label may have (screw deterioration, label scratches, cartridge scratches, slight yellowing, scratches, damage, dirt, stains, yellowing, discoloration, fading, age-related deterioration, etc.). Shipped via Yu-Mail (ships on weekdays). 100 yen off for combined shipping from the second order. We do not reuse images. The product in the description image will be delivered. Before shipping, we will re-measure the voltage (new battery standard approx. 3.10v-3.30V) & perform a simple operation check & maintenance, etc., before shipping. To prevent operational defects and incorrect contents, we have video recordings of the above work & packing & shipping. If you would like to see the images during the above work, please send us a message after purchase. We will attach images to the message before and after shipping so you can confirm. Subjective inspection. Please refrain from purchasing if you are nervous or do not understand retro used items. There may be errors in the description. Please understand that everything is as shown in the images. Also, we have confirmed simple operation on multiple genuine reproduction machines. We cannot guarantee operation on machines other than genuine reproduction machines. We offer a 30-day operation guarantee, but we do not guarantee operations other than startup & saving, etc. In case of operational defects, we will ask to see images of your reproduction machine, etc. If there is a malfunction, we will respond sincerely. By purchasing, you agree to the transaction terms. Thank you for reading to the end. Management number 250807aam