A number of posts on this thread have referred to running down the battery as a result of starting difficulties. I understand the R22/44 series helicopters do not have external power receptacles, although I may be mistaken. If they don't, is a Robinson option or an STC installation available?
As one contributer explained, don't simply accept these repetitive mechanical failures, make sure Robinson and Lycoming are fully aware of them by whatever means possible. Also, don't assume that either manufacturer is fully aware of what is happening with their products in service, it is only with feedback from operators that they can develope product improvements. Remember, repeated technical problems adversley affect the image and reputation of the product, i.e. their 'bottom line', and this is a sure fire way to get someones attention.