#1
★ Top Pick
Mighty Max Battery YTZ10S Replacement Battery Compatible with KTM 890 Duke 21 + 12V 2Amp Charger
The Mighty Max YTZ10S is a direct replacement for the KTM 890 Duke's factory battery, matching the OEM YTZ10S spec with the correct 12V, 8.6Ah rating and sealed AGM construction that handles the Duke's vibration-heavy riding style. The bundled 2-amp trickle charger is genuinely useful for a bike that sits unused between spirited rides. Caveat: some owners report the terminal orientation requires careful cable routing on the 890's tight battery compartment.
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