Hi, I built a 7.2 V battery pack using two rechargeable 3.6V dc batteries. They eventually died and I purchased some different new 3.6 V replacements. Unfortunately, when these are charged they pump out a total of 8+ volts and shut down my device. I'm an electronics dummy other than the basics. I thought I was going to be able to buy a +1.2 to 37VDC Adjustable-Voltage Regulator LM317T from the Shack and just turn the switch (or adjust it) on it to 7.2 Volts, but upon seeing one in the store, there is no switch/adjuster (that I can see by shaking it around in the container), just a block and 3 metal pins. Basically, I want something that I can just attach to the battery pack output wire that will ensure that 1/ no more than 7.2 V DC gets output, 2/ it allows voltage less than 7.2 Volts (it doesn't stop the circuit if the battery is getting low), 3/ Is safe - I can just attach it into the wire and no real electrics shock protection (it's not going to build up a huge charge or anything), "just cover with electrical tape" type of project. I suppose whatever is suggested may cause heat, need heat to be released. Let me know/advice if that might be an issue. It's just for a small video camera - so doesn't use much juice. Thanks for doing the forum. Hope I get some good help, and can hopefully use the forum for some other projects.