Full power and off you go
When it comes to providing power for mobile applications over a long period, conventional starter batteries are often not suitable. By contrast, L4 batteries from Bosch are specially designed for the requirements of long-term discharge. They supply power in those places where no mains electricity is available, and deliver portable energy to boats, mobile homes, golf caddies, and so on. And they are reliable and powerful – just like at home. L4 batteries do not only deliver a lot of energy over a long period, but they can also be completely recharged in a short time.
Advantages
- High deep-cycle resistance – 300 to 400 charge and discharge cycles with 60 % depth of discharge
- Short charging times
- Long service life
- Completely maintenance-free to EN
- Leakproof up to 55°
- Charging with commercially available chargers with IU curve
Please check battery type, dimensions, terminal polarity, and terminal type against the battery being replaced. Even if the battery shows as being compatible with your vehicle, there can sometimes be more than one option depending on individual vehicle specifications. Unfortunately, we cannot guarantee vehicle fitment using vehicle details alone.
The Labyrinth cover: strong and safe
The labyrinth cover on Bosch batteries reliably feeds condensed water back into the battery. The integrated central gas venting system ensures safe removal of gases built up when charging. A flame trap and an additional sealing ring guarantee a high level of operational reliability.
Advantages
- 100% maintenance-free due to very low water consumption
- High level of safety thanks to flame trap
PowerFrame® technology in Bosch L4 batteries
The grid is of crucial importance for a battery's performance and reliability. The patented PowerFrame® offers considerable advantages over conventional grids, and is responsible for an optimum flow of electricity.
More power right from the start: Advantages of PowerFrame® technology
Rigid grid frame
Prevents grid growth and corrosion at the edges and so damage to the separator, or short circuits caused by the grid making contact with the negative plate. PowerFrame® patented grid technology is up to 66% more durable and more corrosion-resistant than other grid designs.
Patterned for Power
The PowerFrame® grid design provides superior cranking power with up to 70% better electrical flow than other grid technologies.
Stamped grid
The rigid, precise structure ensures excellent adhesion of the active material to the grid and permits low-resistance, rapid charging and discharging of the battery. In contrast to conventional grids, there is no brittleness arising from mechanical deformation during production.
Clean Construction
PowerFrame® manufacturing uses 20% less energy and produces 20% fewer greenhouse gases than other manufacturing methods.
Optimum grid structure
More lead is applied to the areas subject to a higher load: the grid is more hard-wearing and resistant to corrosion.
Grid designed for optimum flow
In this innovative design, the grid bars lead directly to the plate link. The low flow resistance ensures optimum conductivity and the fastest possible supply of power to the electrical device.
The SAE J240 (75 °C) life test shows that
The stamped grid (right) exhibits minimal corrosion with virtually no loss of conductivity. In the grid on the left, the material between the alloy grains has suffered corrosion, resulting in a weak flow of current and a shorter service life.
PowerFrame® in comparison with a conventional grid
