I have the Metz 60CT-4 with dryfit battery and yesterday I was going to turn it on to form the capacitor and found that the battery cracked and has only about 3V. So it's no good. I can't find anywhere to buy a replacement battery. I can't find any gel lead acid battery with similar electrical specs that would physically fit in the power pack. I know that the NiCad pack has 5 NiCad cells in it and it's relatively assemble a pack that would fit with NiMH cells. There is a setting in the battery compartment for NiCad or Dryfit but I don't know how to set it. Anyone has any idea? I power up the unit using a bench power supply set for 6V and 3A current limit. It seems to work OK.