brand new and ^^ It adopts high current and high withstand voltage discharge MOSS. The internal components are brushed with three anti-adhesive anti-static, anti-interference), stable ans quality. ^^ The board has short circuit function, overcharge function, over discharge function, balanced voltage function, low conduction internal functions. ^^ Suitable for lithium batteries with nominal voltage 3.7V 10-14 strings ^^ Applied to rechargeable lithium ion battery, lithium ion polymer battery. ^^ ^^ ^^ ^^ ^^