Micro USB charger allows for quicker and convenient charging. Lithium-Ion battery allows for no memory effect or self-discharge. The Syneon Chip is an intelligent electronic control system for Bosch cordless tools that controls the performance ratio of current and voltage depending on the demands of the DIY task. Provides optimum power even in demanding jobs such as working with thick screws. The Syneon Chip prevents overheating, increasing the lifetime of your Bosch tool. Intelligent control of the power output means you always work within the most efficient performance range. All BOSCH tools are suitable of left handed operation