I am seeing some posts on other websites indicating that some battery packs bought from LabRadar for use with LabRadar units have limited percent battery power after 30 or so rounds. Since I am looking to buy a LabRadar, procuring a battery pack that will last for a sufficient number of rounds (60-70 or so) is important to me. Maybe I need two such battery packs; not sure if this will work for uninterrupted recording of muzzle velocity for all 60-70 rounds during load development testing. Recognizing that information to me from LabRadar is that some other (not LabRadar) battery packs may be too powerful and may possibly damage the LabRadar, any thoughts about which battery pack provides sufficiently durable power, or do I need two LabRadar battery packs. All comments are welcome.