I checked the charger and the wattage was lower than the original.
Hmmm, when you said you bought replacements for both the battery and power supply, I assumed
the supply had at least the same wattage capability. Once again, assuming causes problems.
You can always go with a greater wattage power supply, but never lower. If the device was being used just as a charger, it would not be a problem. It would just take longer to fully charge the battery.
But since the device is being used as both a charger for the battery and power supply for the computer, the device must be able to support the combined maximum loads.
the correct voltage, connector, and connector wiring polarity which must be the same as the original.
You can use a greater capability (more current/wattage) device because the battery and computer will only demand what they need, not what the supply can deliver. In some cases, it may result in faster charging times - but that really depends on the charging circuits of the notebook as there may be restrictions to avoid heat issues (always a concern in notebooks).
Let us know what happens when the new charger/power supply arrives. I recommend ensuring the battery has a full charge before putting it through its paces.