Try our re-instated info resource - "Aladdin's Cave" (Main menu)- sorry it's taken so long to fix
I have used Tanya which is cheaper and lasted well
I prefer the conventional Yuasa batteries, a precise fit for our bikes. On my bike each Yuasa lasted 7 years. If you wanna profit fully from AGM technique like Motobatt offers, 14,8 V charging is needed. Gel batteries on the otherhand don't like charging over 14,4V. Acid lead batteries like the Yuasa are forgiving and deal with spikes nicely. No adapters needed and no risk of error connecting.