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I am thinking of buying the PVR22 (Clubsport) Race Battery from Powervamp via eBay. From what I can tell, reading previous forum posts and the description on eBay, this will be suitable for starting the Ford 1.7 Kent Crossflow (Xflow) in my SEiW. However, Powervamp have a more expensive battery, the PVR25 (Odyssey PC680) Race Battery, which also seems to be suitable too. I am not knowledgable about batteries, so I looked at the specs and they look pretty similar but with the cheaper PVR22 having better spec, smaller dimensions and being lighter too! PVR22 Amp 20Ah Dimensions 181 x 76 x 166 mm CCA 300A Peak 700A Weight 6.5kg PVR25 Amp 18Ah Dimensions 185 x 79 x 170 mm CCA 265A Peak 680A Weight 7.0kg What would be the advantage of buying the PVR25 over the PVR22? The engine is not highly tuned (about 110 bhp) and is road use only. I have read previous threads on the subject but none of them seem to get to the bottom of the issue. I don't want to pay more for something I don't understand but, equally, I don't want to buy the PVR22 and then realise I should have bought the PVR25 in the first place, as that would be a false economy. Also, with the PVR22/25 batteries, do I need to treat them differently than the Varta standard lead acid battery its replacing. Specifically, I am think about the need to put the battery on charge whenever park it up? Normally the car is SORNed all winter and then used infrequently between April and September, so would I need to leave it plugged in with the supplied charger (I'd buy the bundle with the charger and bracket with the battery)? There is power in the garage, it just seems like a bit of a faff and a trip hazard. Finally, the existing battery cables are not in great condition and the FIA Kill Switch is inconveniently located, so I am thinking of replacing them and relocating at the same time. There are 25mm2 and 35mm2 cables on offer from Powervamp; I suspect that the 25mm2 cables are fine but how do I work out which is the correct size for my application? I know I could measure the existing ones but it is no guarantee that they were right in the first place. Thanks in advance, Bill