YTX12-BS · 3 min read
YTX12-BS Motorcycle Battery: Dimensions & Polarity
Dimensions, polarity, what the code means, similar battery codes and the replacement battery.
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.
€27.40 VAT included · Satkit price checked on 7 October 2026
Prices incl. VAT checked on 7 October 2026; they may change.
This is a direct replacement for the YTX12-BS, with the same voltage, polarity and case dimensions. It leaves the factory with the electrolyte inside and is charged, so there is no acid pack and no waiting: check the voltage and fit it.
Use a smart motorcycle battery charger: the recommended current is about 1 A (capacity divided by 10), and never more than 3 A.
Dimensions, terminal layout and similar battery codes: YTX12-BS battery part number page.
Related guide
YTX12-BS · 3 min read
Dimensions, polarity, what the code means, similar battery codes and the replacement battery.
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 · YTX20-BS
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