FNB-38xh: 9.6volt 1450mAh LONG LIFE high-watt rechargeable Ni-MH battery for Yaesu radios. Replaces original FNB-38. Fits FT-51/R, FT-41/R, FT-11/R radios, etc. Provides High-Watt transmit capability. Has same physical dimensions as original FNB-38 battery, but the FNB-38xh provides over twice the operating time. It can be re-charged in slow chargers (make sure the wall TX output is 11.5VDC or more for your cradle charger), or in desktop Rapid Chargers such as the EMS-38.