Will Using A Different Charger Ruin My Phone. This was most likely a malfunction in the charger adapter which caused damage to the battery. However if you connect the same phone rated at 12W and connect it to a charger that only supplies 5W either it will charge slowly or it may damage your charger and possibly your phone.
In general yes it is safe to plug your laptop charger into your phone. While it is a quite rare situation that occurred to me if you can avoid having to pay hundreds of dollars you might want to consider this. You can actually use higher amperage chargers like the kind that come with tablets to get your phone charged up in less time than it would if you charged via USB or using the charger the phone.
If the supply voltage is to high.
By very old we mean a charger that supports up to 5W charging which used to come with several-year-old iPhones. This does not damage the phone. The fast charging mode higher power output is only enabled if a phone is requesting it from the charger. Not unless you want to ruin your gear or wait a lifetime for it to recharge.
