One my beefs with the Kruzer is the battery life in the Multi Kruzer especially in low frequencies even though you get close to a full day run time it is nice not have to recharge every time your done. I went and got the external battery for it which balances the machine even better but also noticed they use the same battery pack as the Garrett AT series detectors. I think I will use my RnB litho battery on it to see how long it lasts and see if the battery life indicator shows battery