Makita 4Ah 18v LXT Battery & Charger Kit inc 2x 4.0Ah Batteries & DC18RC Charger This kit contains 2x Makita BL1840B 18v 4.0Ah Li-Ion batteries with LED state of charge indicator and a DC18RC 18v intelligent charger. The Makita 18v 4.0Ah Lithium-Ion battery contains high energy density technology. Being Lithium-Ion, the BL1840B has no memory effect and is much lighter than other battery types. Fits all Makita 18v Li-Ion tools. Battery has the Makita \'Star\' technology so if your tool also has a \'Star\' you can be assured of battery protection. The DC18RC has a cooling fan and Active 3 Controls. This means that during the loading of the charging voltage, charging current, and temperature is held in the holes. The cooling system blows cool air into the battery. As a result, high temperatures occur in the battery, so that the battery life is extended, and the charging process is accelerated. BL1840B 4.0Ah Lithium-ion Batteries FEATURES Battery capacity indicator LED\'s show how much juice you have left on demand Foam cell technology Slide on battery - firm holding with multi contacts and shock absorbing pack, will not puncture and remains cool even in heavy use Unbeatable 36 minute charge time Same weight as 3.0Ah battery Works with your current Li-ion Chargers Longer run time and battery life All new 4Ah+ tools are compatible with 18V 3Ah and less Li-ion batteries SPECIFICATION Voltage: 18v Battery Type: Lithium-Ion Battery Capacity: 4.0Ah Weight: 1kg (approx) Charge Time (DC18SD): 90 mins Charge Time (DC18RA/DC18RC/DC18RD): 36 mins DC18RC Charger FEATURES Fast charging - charges Li-Ion 3.0Ah battery in only 22 minutes Built-in CPU - gathers information from the battery\'s memory chip to determine optimum charging method Forced air cooling fan - cools the battery to minimise charging time Digital power display identifies the condition of the battery and charging condition Makita’s 18v & 14v batteries have a built in memory chip that records the battery usage history. While the battery is connected it will transmit the data to the charger A great advantage of Lithium Ion technology is that it provides the user with the possibility to charge the batteries anytime, without any need to wait for their complete power deployment. A great improvement compared to older technologies like Ni-Cad SPECIFICATION Cell Capacity: 1.5-5.0Ah Charge Time (1.5Ah): 15 mins Charge Time (2.0Ah): 18 mins Charge Time (3.0Ah): 22 mins Charge Time (4.0Ah): 36 mins Charge Time (5.0Ah): 45 mins Net Weight: 820 g Overall Length: 185 mm