This is a very weird one. I have 3 Motorola MT500s, and one brand new Omni battery. All 3 power up fine from a power supply. But only one of them powers on with a battery. The one that works with a battery is VHF low band (thicker model). The ones that do not work with the battery are VHF high band. One is omni model, one is universal. Is there some sort of wiring weirdness here? Also it seems the charger I have does not acknowledge the battery, but I do not know if the charger is good or not. I do have another battery in the mail but fear it will have the same strange issue. Any ideas, or weird battery differences between low and high band / UHF models that aren’t well known? Thanks