❗❗❗NOTE: This NEU MASTER New Battery System 4.0AH Battery Pack（NBT0032-1840） is NOT work with the OLD Charger (NCH0010&NCH0011)each other. Please Check the Model before purchase. 【New Upgraded System】: The Upgraded Battery System [ 4.0AH battery] fits for NEU MASTER 20V Max. Lithium-ion tool. 【Multi-Protect Safety】: This battery is equipped with overload protection, overheat protection and over-discharge protection to ensures safety usage 【Compact design】: The same function and size for less weight and reduced operator fatigue, which is easy to install. 【LED Display】: NEU MASTER`s 4.0AH battery is equipped with Integrated LED indicators allows to view the current state correctly. NEU MASTER New Battery System NBT0032-1840 20V Max. 4.0Ah Lithium Ion Battery-Pack (4.0)