I have read & seen (eg MKBHD) that some people load their laptops like the 13 "macbook pro with chargers made for 15" models. Is it really bad to charge a 45W laptop like the ThinkPad L380 with a MacBook Pro 15 "charger, so it just charges faster or does it harm the battery?
As long as the tension is not higher, nothing can happen. Otherwise, it is not recommended. Best thing that happens is that it just gets a bit warmer, but it could also be broken. 35% more watts is no longer in the border area where nothing will happen.
The power supplies of the 13 "MBP are so weak that the battery under heavy load (eg rendering) continues to discharge despite connected power supply, I know that of some co-workers, especially designers, the power supplies or just the PSU from 15" MBP, used,
If the voltage is right, it's pretty bad, with higher currents creates more heat, which can actually affect the cells, on the other hand, the charging process is controlled today, there are sensors on the battery, which reduce the current at too much heat (otherwise technologies such as FastCharge not possible today).
The heat is actually what destroys the battery.
Now it is the case that the heat development increases with the energy density, i. Especially at the beginning you can charge a battery with significantly higher currents, it is important that the charging process is controlled and not permanently loaded with too much amperage.
Incidentally, this is not only true for such standardized power supplies, it is generally advisable to charge the battery only about 80% (for example, in the case of batteries in cars If the charging is already terminated before, which significantly increases the life of the battery).
For mobile phones, it is at least the case of Samsung from 80% off the fast charging and it slowly recharges.
No, it does not hurt the battery. The 61 watt only mean that the power supply can provide this power but also does not have to. With my car, I can also drive 30, although it is with its about 300 ps in a position capable of reaching 250 km / h…
i dare even go so far as to say that it may even be better if you also operate the device via the adapter, then it may be that the charger with the greater power prevents the device from losing energy in use the battery must be added. That makes the battery live longer.
