Hi guys I'm trying to find a company, or someone in the UK that can upgrade My 48v 13ah dolphin style battery to a 52v pack. Also would this upgrade in turn up the ah rating -surely it must right? I recently read an article that suggests you should try an make your volts + ah equation = the grand total of your motor watts. In My case 1000watt, at present I'm only achieving 48v ×13ah= 624Wh. 380watts doing nothing, unused! Can anyone offer any advice, or have I got this equation all wrong. PS: My controller is 48v –30AH Max- 18AH rated Fully Matched Intelligent Controller Cheers guys.