Last items in stock Laser Alignment Survey Battery Ni-MH Battery fits Laser Alignment, 3900, 3920, 550634 4.8V, 5000mAh CS-LS3900SL $73.81 PLEASE NOTE - this battery pack comes with 2 different types of connector - please look at your pack and compare to the image above. If your connector looks different - Please do not order this one.High-quality parts and components are used to provide an extremely long and useful life. We want you to get the right battery the first time. We will select... Add to cart