In short
- 12 V · 4 Ah · 45 A EN
- 121 × 71 × 93 mm · + right
- Satkit replacement: YB4L-B gel motorcycle battery
The YB4L-B is a 12 V conventional flooded motorcycle battery from the YuMicron range: 4 Ah, 45 A cold cranking amps (EN) and a case measuring 121 × 71 × 93 mm. It has the positive terminal on the right, viewed with the label facing you.
Dimensions and specifications
| YB4L-B | YB4L-B gel motorcycle battery | |
|---|---|---|
| Voltage | 12 V | 12 V |
| Capacity | 4 Ah (10 h) · 4.2 Ah (20 h) | 3.5 Ah |
| Cold cranking amps | 45 A (EN) | 60 A at −18 °C |
| Length × width × height | 121 × 71 × 93 mm | 113 × 70 × 86 mm |
| Polarity | Positive terminal on the right | Positive terminal on the right |
| Technology | Conventional flooded | Gel |
| Delivery | — | — |
| Weight | — | 1.6 kg |
The battery code column gives the specifications from Yuasa's product page, the brand behind the code. The other column gives the specifications of the battery sold by Satkit. Capacity is compared using the same hour rate, and starting current using the same standard.
What does YB4L-B mean?
- YB: Yuasa's YuMicron range of high-performance conventional flooded batteries.
- 4: in this case, it is close to the capacity: the YB4L-B has a capacity of 4 Ah at the 10-hour rate.
- L: reversed polarity, with the positive terminal on the right when viewed with the label facing you.
- -B: the combination of terminal layout, vent outlet and case shape. There is no general rule; check the drawing for each battery code.
Battery codes that are easy to mix up with the YB4L-B
| Battery code | Dimensions | Polarity | Difference |
|---|---|---|---|
| YTX4L-BS | 114 × 71 × 86 mm | + right | Different case: 7 mm shorter and 7 mm lower. |
| YB4L-A | 120 × 70 × 92 mm | + right | Almost the same case and the same polarity, but from a different range: check the terminals. |
| YB3L-B | 99 × 57 × 111 mm | + right | Different case: 22 mm shorter, 14 mm narrower and 18 mm taller. |
Satkit battery for YB4L-B
YB4L-B gel motorcycle battery: 12 V and 3.5 Ah, 60 A starting current, sealed gel battery.
Before switching to a sealed battery
The original is a conventional flooded battery. An AGM or gel battery is a maintenance-free replacement if the motorcycle's voltage regulator / rectifier charges between 14.0 and 14.8 V with the engine running at 3.000–4.000 rpm. If it charges less, stick with a conventional battery. A sealed battery has no vent tube, so leave the motorcycle's vent tube disconnected.
Motorcycles that use the YB4L-B
7 versions by make and model
MBK
- Booster 50 from 2004
- Nitro 50 from 2013
- Speedfight 50 3/4 from 2009
- Vivacity 50 from 2008
- Aerox 50 2T 1997–2012
- BW's 50 from 1999
Derbi
- Senda 50 DRD 2000–2017
