Purchase a Bosch GLL330-80CGL 18V 360 Degree Connected Green-Beam Three-Plane Leveling and Alignment Laser Kit and get a Bosch GBA18V40F 18V CORE18V Lithium-Ion 4.0 Ah Compact Battery FREE! The promotional item will be automatically added in cart to qualifying orders. Limit 4 free batteries per order. This promotion is valid for online and in-store redemption.