Thumb Score: +14 The kit comes with an M12 4.0 battery and is marked down to $160 (already a good deal) but you can add the free M12 2.5 battery and return it to get the price for the grinder and battery to $106. If you don't like "The Hack" then you would still get a solid deal at $160 for the grinder and 4.0 battery. https://www.homedepot.com/p/Milwa.../322135725