the Duke and CBR both use 10 year old optimates without problem, thinking of putting more on the BSA and Triumph because they dont get used often enough.
cant be ar$$ed taking the battery off because if the weather looks good I might want to go for a ride during winter. then half the plastics have to come off!!
also helps to keep the motor turning over and oil circulating on the cams.
really depends on what battery you have as well, Ive had better luck because I fit lucas ones, or Yuasa , the cheaper RobH ones dont last as long as they only cost half the others
