AGM batteries don't gradually decline in performance, they work and work and work and just stop. We sell Yuasa batteries at work, with 3-, 4- and 5-year guarantees (3-series, 5-series and 7-series respectively). Your Yaris's battery is at least 6 years old and probably closer to 7, it's time for a change. I'm not certain if the Yaris hybrid (Mrs Dave_ has a 65-plate one and loves it) requires a new battery to be coded to the car, I'll check this tomorrow.
Last edited by: Dave_ on Thu 16 Jun 22 at 20:33
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