I upgraded my 25 year old DC H10-30 headset several years ago with the Headsets Inc ANR kit. Initially I stayed with the original ear seals which were OK but last year I changed to the GEL seals from Skylines. I am now very pleased with the overall result and realise I should have done the ANR conversion years earlier. I also use rechargeable batteries and have had no issues with these (so far).