We offer our customers low price, high quality products. All cleaning battery are brand new and unused (compatible Cell Phone Battery OPPO). We often stock battery for various manufacturers, such as Dell, ThinkPad, NEC, Fujitsu, Sony, Toshiba, Acer and HP. Includes over-discharge and over-charge protection circuits. We have used it for many customers with one year of security. In addition to individual customers, many customers such as companies, government agencies, educational institutions, etc. have gained a high reputation.