I've been using phone chargers / GPS, etc devices for 4 years w/o problems. Recently I purchase a phone charger and an outlet multi-spliter. Both of these new devices quickly blow fuses (plugged in under center armrest &/or under A/C controls - 10a / 20a fuses) with NOTHING being plugged into them. AMP ratings are OK. Both new devices otherwise check out OK. The old devices continue to work OK. What could be the problem? Is there some new type of plug I need to avoid?