My daughter and son in law bought a Husquvarna cordless hedge trimmer / chainsaw, in 2 years the battery has been replaced 3 times under guarantee as it stops holding its charge, Iv'e instructed them not to totally discharge the bat, not to store in cold / damp conditions etc, they have taken it back to the dealers again for replacement who are going to contact Husquvarna before replacing the battery for the 4th time, has anyone else had problems with this manufacturer?