For those not on the mailing list or that have hit and miss issues with getting them. The PowerCore II 20000 & 10000 currently have a 20% discount for UK residents until October 24th 23:59pm. Discount code ANKERPC2 for either. Limited quantity, first come, first served 
PowerCore II 20000 - now £30.39
PowerCore II 10000 - now £20.79