I don't see any point in an AGM battery - if you need to use a different charge profile on an off-car battery charger to get them right, I doubt the difference in on-car charging via the voltage regulator and alternator aren't going to be significant too.
I got the Yuasa from Halfords with my trade card (find anyone with an automotive background or college kid to get access to one) HSB019 silver/5yr warranty for £100 incl VAT
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===SOLD===2002 Audi S8 D2 Final Edition (yes, really) in Avus Silver with purple extended leather===SOLD===
2011 S5 Sportback in Phantom Black with black Super Sports leather, 9x20s, tech pack high, adaptive xenon plus, intelligent key, memory seats pack, sunroof, B&O, Audi Drive Select & quattro Sports Diff, DAB, parking system plus
2015 VW Golf GTI Performance Pack in Carbon Grey with black Vienna leather, tech pack (Discovery Pro nav & Dynaudio), DCC, factory towbar and retrofit RVC
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