Got a 4.0Ah in the Amazon deal posted a few weeks back so thought I'd return the favour! First time as well! Just got a notify price email on the 5.0Ah 18v battery at powertoolworld, £14 off - looks like theyre having a xmas 24 hour sale (http://www.powertoolworld.co.uk/christmas) - Makita 18v batteries in there too if anyones interested. Next cheapest I can see is £59.89. I got x2 for £90 + free delivery. Thanks!