Makita 40V Max 5.0Ah Battery Twin Pack The 40V Max 5.0Ah battery has been designed to be both tough & also highly intelligent. The higher power output enables XGT tools to be pushed even harder performing heavy duty continuous operation with ease. Digital communication not only between the battery & the charger, but also the tool & battery. This communication with the tool, relays tool specifications to optimise tool performance. The higher battery output is a genuine solution for heavy industrial users allowing for continuous high demand activity over extended periods of time. Built to be highly durable the XGT batteries feature a heavy duty cell casing significantly improving the batteries impact resistance. Along with this casing the water resistance has been significantly increased with intricate 3 layer moisture protection shield protecting the cells from water ingress. Reliable tools are a must for all professional applications, & XGT is durable & built to perform!