What is the ampere rating of a 125cc motorcycle battery?
2 Answers
125cc motorcycle batteries are typically 12V9Ah. Here is a detailed introduction about motorcycle batteries: Overview: A battery is a type of storage battery, also known as an accumulator. The working principle of a battery is to convert chemical energy into electrical energy. The typical battery referred to here is a lead-acid battery, which mainly uses lead and its oxides as electrodes and a sulfuric acid solution as the electrolyte. Others: The plates of ordinary batteries are composed of lead and lead oxides, and the electrolyte is an aqueous solution of sulfuric acid. The main advantages are stable voltage and low cost. The disadvantages are low specific energy (i.e., the amount of electrical energy stored per kilogram of battery), short service life, and frequent daily maintenance.
As a frequent motorcycle rider, I have to say that the ampere rating of a 125cc motorcycle battery is generally 7A or 9A, depending on the model and brand. From my experience, most 125cc bikes use a 12V battery because the starting current of motorcycles is small, and a 7A battery is sufficient for daily riding. If you choose the wrong ampere rating, such as one that's too small, it may struggle to start in winter, affecting your travel plans. My own Yamaha 125 uses a 7A battery, which lasted over two years before showing signs of aging and needing replacement. I recommend checking the battery every six months for leaks or insufficient voltage. Keeping the battery clean can extend its lifespan and prevent unexpected breakdowns. If the battery fails, don’t try to save money by buying a used one—always replace it with a new battery that matches the original specifications, as safety comes first. Remember, even though the battery is small, it’s crucial for smooth starts, so never neglect regular maintenance.
