10/20/2026
An EV can show 70% charge on its traction battery and still refuse to wake up the next morning. The culprit is often the small 12-volt battery that powers the modules and helps bring the high-voltage system online. Age alone is a weak basis for replacement, since two identical EVs can have very different battery health. Testing shows whether the battery can actually support the vehicle’s low-voltage systems. Replacement decisions based on measured condition keep customers on the road and avoid unnecessary repairs.
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When testing shows it can’t support the vehicle’s low-voltage electrical systems as it should, not simply because it has reached a certain age, an EV’s