PMNN4017 rechargeable walkie talkie battery for Motorola CT250, CT450, PRO-3150, etc. With 7.2V/7.4V Voltage and Ni-CD Ni-MH Li-ion Cell Typeand 1100mAh 1300mAh 1500mAh 1800mAh cell capacity. this brand new replaceable and rechargeable two way radio battery is the cost-effective one which can fit in lots of Motorola models and replace PMNN4018 and other batteries.