Starter Batteries, More starting power, optimal performance in extreme conditions, 100% maintenance-free, ultra-low self-discharge, faster charging, extended service life. OPTIMA® batteries are fully sealedand absolutely spill-proof even if the monoblock is damaged. Instant starting power is the strength of OPTIMA RedTop batteries. This means unparalleled starting capabilities for professional engines under heavy use, which must always be ready to start. The secret to this power is OPTIMA's SpiralCell Technology®, which ensures maximum starting power for large diesel engines and heavy-duty equipment. This technology provides maximum starting power even in adverse weather conditions, with temperature ranges from + 40° to - 40° C. Thanks to its solid, waterproofed construction, the battery can withstand extreme stress, delivering maintenance-free power wherever you want to go. Dim. mm. 254x172x200