So my OEM Honda battery (original factory fit) seems to be on its last legs and I have read in the past some people saying the Honda battery on the Tourer is under-powered given all the gadgets on the Tourer like the heated seats, powered tailgate etc. Was wondering about a Bosch battery instead. Any thoughts? I have a 2008 Tourer 2.0 petrol EX model - not the latest shape. A couple of questions - do you think it will void the extended Honda warranty I have if I fit a Bosch battery? Any idea about a suitable model? Are Bosch batteries worth the extra cost (roughly douible price of Honda) ?