You can pay $235 for the battery and charger or you can buy this brushless impact driver including the battery and charger for $179.
200Nm tightening / 350Nm breakaway torque.
1/2" square drive with 1/4" internal hex so you can insert driver bits directly.
The hammer drill kit is also a good deal at $199. Thanks to @Spending2Much for spotting the hammer drill!
The 5AH version is $245. That drill model has slightly lower torque though.
On that one, I suggest checking reviews carefully, while there are several versions at least some have been criticized for lacking power.
If at all possible, try one in a store and make sure the trigger action is to your liking.