YTX20-BS · 3 min read
YTX20-BS Motorcycle Battery: Dimensions, Polarity and Equivalents
Dimensions, polarity, what the battery code means, similar codes and the battery that replaces it.
Maintenance-free AGM · YTX20-BS
12 V, 18 Ah battery with 300 A CCA, replacing the YTX20-BS. Sealed gel technology, maintenance-free. Positive terminal on the left.
€39.36 VAT included
Sealed battery for the YTX20-BS battery compartment: it never needs topping up and has no vent tube.
Use a smart motorcycle battery charger. The recommended charge current is around 1.8 A (capacity divided by 10), and must never exceed 3 A.
Dimensions, terminal diagram and similar battery codes: YTX20-BS battery part number page.
Related guide
YTX20-BS · 3 min read
Dimensions, polarity, what the battery code means, similar codes and the battery that replaces it.
Buying guide · The basics · 16 min read
To get it right, you need four details: the battery part number, dimensions, which side the positive terminal is on, and cold cranking amps and capacity that match or exceed the original. Here’s how to find each one, which battery type suits your motorcycle, and how to look after it so it lasts.

Maintenance-free AGM · YT12B-BS
12 V, 10 Ah battery to replace the YT12B-BS. Sealed gel technology, maintenance-free. Positive terminal on the left.

Maintenance-free AGM · YTR4A-BS
12 V, 2.5 Ah battery with 50 A cold cranking amps, replacing the YTR4A-BS. Sealed gel technology, maintenance-free.

Maintenance-free AGM · YTX12-BS
12 V, 10 Ah battery with 180 A cold cranking amps, a replacement for the YTX12-BS. Factory-activated and charged, ready to fit. Positive terminal on the left.