Look for Makita tools and batteries with the STAR and get these protection features. Makita Star Battery - Overload Protection High-drain applications require maximum battery power. Makita tools and batteries are engineered for industrial applications, but sustained peak demand can overload the tool. Makitas STAR Protection Computer Controls allow the battery and tool to communicate and protect your tool and battery from overload by cutting power when put under abnormally high current draw. Makita Star Battery - Overcharge Discharge Protection Lithium-ion batteries are engineered for longer, sustained performance.But running a battery until its dead empty can damage the cells. Makita STAR Protection Computer Controls monitor battery charge capacity, and if the battery is too low to complete the application it will cut power in order to extend battery life. Makita Star Battery - Over heat protection Extreme heat is the enemy of ALL batteries. It can make batteries charge slower, damage battery cells, and reduce battery life. Makita STAR Protection Computer Controls monitor battery heat during operation. If the battery reaches a certain level of heat it will cut power to the tool. This battery is suitable for the following machines: - BDF451RFE , BDF451RFE3 - BDF452RFE , BDF452REF3 - BDF452Z - BDF453RFE - BDA350 , BDA351 - BTD140RFE , BTD140RFE3 , BTD140Z - BTL061RFE , BTL061Z - BTW450RFE , BTW450Z - BTW251RFE , BTW251Z - BGA452RFE , BGA452RFE3 , BGA452Z - BFR750 - BFR750RFE , BFR750RFE3, BFR750Z - BFR550RFE , BFR550RFE3 , BFR550Z - BCS550RFE , BCS550Z - BSS501RFE , BSS501Z - BSS610RFE , BSS610Z - BJV180RFE , BJV180Z - BPB180RFE , BPB180Z - BJS130RFE , BJS130Z - BJR181RFE , BJR181RFE3 , BJR181Z - BJR182Z - LXT600 , LXT400 , LXT202 Includes the DC18RD Dual port charger, capable of charging two Makita 18V batteries, simultaneously, and it will recharge both in the same time as with their actively cooled rapid charger. The range of Makita machines utilising two 18v Lithium-Ion batteries to generate a mighty 36v of power is expanding quickly. Therefore the new twin-port fast charger that takes just 22 minutes to fully charge two 18v 3.0Ah batteries will prove invaluable. This new twin-port charger will charge two 4.0Ah batteries in 36 minutes. The item "Makita BL1840 18v 2 x LXT 4.0ah Lithium-Ion Batteries + DC18RD Dual Port Charger" is in sale since Monday, October 05, 2015. This item is in the category "Home, Furniture & DIY\DIY Tools\Power Tools\Batteries & Chargers". The seller is "buyaparcel-store" and is located in GB. This item can be shipped to all countries in Europe, Australia.