Production of Shenzhen power-time tech. According to ISO9001: 2000 standard strictly. Imported ultrasonic and spot welding machines are used. That make their battery durable, difficult to be broken. They commited themselves to intelligent fast charger study all the time. Till now, they can make different logic PCB boards with comprehensive charge and discharger control and protection. Renovation earphone and mic style and technology are power-time's target. Their products can suit for Motorola, kenwood, icom. Vertex, alinco, kyodo, simocco, Nextel and other international brand. And most products hold on ce certificate. Products are 95% for exporting and another 5% for domestic railway department because of their high quality. They are glad to do OEM & ODM. Please feel it at home to contact them for more detail. They are your best choice on two-way radio accessories.