Go easy on a me as i am a first time poster / long time lurker, but i was in Bunnings on the weekend and saw some cards advertising a 2 pack of 36V Batteries for $299. I didn't think much about it and i didnt take a picture, but the hubby said it seemed like a great deal when I got home. I decided to check the price of a single battery on Ryobi's site. It wasnt on the Bunnings site when i checked. A single 36v 4.0ah pack is $249 ! Seems like a bargain to get a second battery for only $50, and appears to be widely available in Vic. We have had their mower for a few years and brushless whipper snipper and love them, but one pack seems to be on its last legs and is out of warranty so we decided to take the plunge. You definitely can use the extra packs when lazy and let the grass get too long.