YB7-A · 3 min read
YB7-A motorcycle battery: dimensions, polarity & equivalents
Dimensions, polarity, what the name means, similar battery codes and the battery that replaces it.

Replacement for conventional battery · YB7-A
12 V, 7 Ah battery to replace the YB7-A. Sealed, maintenance-free AGM technology. Positive terminal on the left.
€19.67 VAT included · Satkit price checked on 7 October 2026
Prices incl. VAT checked on 7 October 2026; they may change.
Sealed battery for the YB7-A battery compartment: it never needs topping up and has no vent tube.
The original YB7-A is a conventional flooded battery. A sealed battery replaces it without maintenance, on one condition: the motorcycle's voltage regulator / rectifier must charge between 14.0 and 14.8 V (measure at the terminals with the engine running at 3000–4000 rpm). For older motorcycles that charge below this range, stick with a conventional battery.
It is slightly shorter than the original battery part number (10 mm less in height): it fits in the compartment, and you can use a foam block to fill the gap and stop it moving around. Check that the cables reach the terminals.
Use a smart motorcycle battery charger: the recommended current is around 0.7 A (capacity divided by 10), and never more than 3 A.
Dimensions, terminal diagram and similar battery codes: YB7-A battery part number page.
Related guide
YB7-A · 3 min read
Dimensions, polarity, what the name means, similar battery 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.

Replacement for conventional battery · 12N12A-4A-1
12 V, 12 Ah battery to replace the 12N12A-4A-1. Positive terminal on the left.

Replacement for conventional battery · YB3L-B
12 V, 3 Ah battery with 35 A cold cranking amps, replacing the YB3L-B. Sealed gel technology, maintenance-free. Positive terminal on the right.

Replacement for conventional battery · YB4L-B
12 V, 3.5 Ah battery with 60 A CCA, replacing the YB4L-B. Sealed gel technology, maintenance-free. Positive terminal on the right.