The Little Bramper itself is a great little device but is anyone else having problems with the 4--battery holder used with them? I have broken 2. In each case one of the terminals "herniated", or rather the plastic around them.

That sounds unpleasant. I've not seen anything like that myself, unless it's due to melting. If the power contacts are somehow shorted for a period of time, the current drawn from the batteries is enough to cause the plastic to melt. If that's the case, I'd recommend just putting a tab of tape over whatever's getting shorted. I'm actually transitioning to a battery pack that is stuck to the underside of the PCB. Makes the thing more integrated. I can't offer this immediately, but eventually I'd be happy to exchange your version with this latest revision. Until then I will include a spare battery holder.

Thanks Thomas but you don`t need to exchange anything. After the first broke, I bought 4 spare ones for 2 Swiss Francs each which should hopefully see me right for a while.