This is a follow-up question to my previous one: I observed that my laptop chargers spark when plugged in and the common elements seems to be power cords with on-off switches (like this one). It seems to me that if the power cord doesn't contain an on-off switch OR if I use a "over-voltage protector" type powercord the charger doesn't spark. In addition I lost 4 power-cords in a short period of time (a couple of months) to - I suspect - the laptop charger.
The power cords lost happened the following way:
- one shorted out in the middle of the cord an burned a hole
- one simply shorted out when plugging in (probably at the switch)
- two shorted out when switching on (they were off, I plugged in the charger and turned them on)
I know for example that economic light-bulbs don't work well together with switches which have lights in them. Could the same be true for laptop chargers?