9.6V, 1000mAH, Ni-MH Battery fits Vertex, Ft-10, Ft-10r, 9.6WhBattery Fits Models: Ft 10, Ft 10r, Ft 40, Ft 40r, Ft 50, Ft 50r, Vxa 100 Battery Part Numbers: Fnb 41, Fnb 42 This battery should be the same or greater capacity than the original battery. We supply generic replacements for the OEM batteries; we have had thousands of satisfied customers using these batteries as an economical alternative to the original manufacturer's battery. If you have the battery model number, this is usually the best way to