I urgently need some rechargable batteries for my walkie-talkie radios. The ones I have are marked NI-MH Battery Pack, Model BP40 and they are like 4 AAA batteries in one pack. I know I can get them at Radio Shack in Santiago but have no plans to go there in the short term and, with all these robberies I keep hearing about, I would like to be able to maintain contact with my neighbours. Can anyone please help in giving me information of where I may get them without a trip to a city?