F67R155-01 Fits R2/3/4. You have surely had the experience that the service life of a conventional lead-acid battery is usually very limited. On classic vehicles in particular, lead-acid batteries are only used occasionally, so that they fail very quickly. In addition, there are problems with the escaping gases, which are very aggressive and attack the paint. Even more disastrous is the so-called boiling of the lead-acid battery, during which sulfuric acid inevitably escapes. Even small amounts destroy paint, chrome and clothing. Especially after a successful restoration with new paint and chrome, this is a catastrophe. We therefore recommend maintenance-free and gas-tight gel batteries, with which these problems cannot occur. These batteries have the following advantages: 1. Ready for immediate use 2. Absolutely maintenance-free 3. Gas-tight 4. Long service life 5. Long shelf life