【Product】 FRAM-Modified Battery-less Game Software GBA Game Boy Advance Shin Megami Tensei Devil Children: Book of Darkness Devil Children: Book of Light 【Description/Condition, etc.】 The depleted battery has been removed and replaced with a new FRAM (or other memory like flash memory) that has no degradation, allowing save data to be continuously stored without a battery. *Initial operation confirmed with genuine GBASP unit. *Save data and load data confirmed. *Cartridge and contacts cleaned and maintained. *Price will fluctuate based on product condition, market price, etc. 【Notes/Important Information】 *As this is a used item, the cartridge, label, etc. may have scratches, dirt, yellowing, odors, or peeling labels due to age and use. Please confirm the condition through images and questions. *This does not guarantee the permanent operation of the game software. *Turning off the power during saving, freezing due to impact, or other unexpected operations may lead to damage to save data or FRAM. We recommend backing up important data. *As this is used software, there may be issues with reading the data. *Operation has not been confirmed on devices other than genuine Nintendo handheld game consoles. Operation is not guaranteed on other models or compatible devices. *FRAM degrades with saving and loading, but for normal play, the degradation is not a concern. *The condition of the product is based on my personal judgment as a used item. *If there are any issues with operation upon arrival, please contact us before leaving a review. *Please check our profile if you wish. Please consider and purchase after understanding and agreeing to the above. Search for other items for sale below! #YUYU・SHOP v0200