SubC MH-Ni batteries with high performance were developed and end-face weld process was used successfully in the preparing technology. Studied the effects of the positive electrode plate thickness and electrolyte content on the performance of batteries, determined the thickness of the positive plate and the best electrolyte content, and investigated the relations of electrolyte content with inflating and leakage. The prepared SubC MH-Ni batteries are of high capacity, lower internal resistant, high-rate charging and discharging as well as stabilized cycle performance.