EXFO lists GP-2253 as an official EXFO replacement battery part number (Li-Ion 14.4V square) used for several EXFO products (FTB-1V2 family, MAX series such as MAX-860/860G/880/890, etc.). EXFO's knowledge base provides the part-number mapping but does not publish a dedicated product page or full spec sheet for GP-2253. Distributor product information (LaptopBatteryDirect) supplements manufacturer data with typical attributes for the replacement battery: 14.4V, 3400mAh capacity, 4 Li-ion cells, black color, 1-year warranty, and product images.