Can A Charger Ruin Your Phone. Answer 1 of 2. A portable charger of questionable quality can potentially deliver a lower or higher voltage than your phone is designed to handle and this can damage not only your phones battery but possibly other electrical circuits in it.

As long as the charger puts out the right voltage and has a connector that ph. Temperature can affect the longevity of your phone battery so make sure you dont charge your phone on heat conducting materials and under very low or very high temperatures. Excessive power can even kill the battery or in some cases cause the battery to burst or set it on flames.
Can it damage the phone even if it seems to be working.
USB chargers and cables. Some chargers take much longer to fill your battery. A trickle charge. Fortunately there are precautions to take when buying a charger.

