Normally, during recharging, an adapter forces lithium ions from a battery’s positive electrode, or cathode, to the negative electrode, or anode, at a continual rate until the battery is full. Over time, the battery degrades due to issues like lithium plating (where lithium ions bond to each other) that occur as a result of pushing these ions from one place to another. Speeding up the charging process by forcing more power into the battery will only ruin the battery more quickly.