How to Fix a Motorcycle Battery That Won't Charge?

[Penelope]

If a motorcycle battery has been stored for two years and won't charge, showing severe discharge, it must be boosted to over 10V using a high-resistance repair mode on a battery charger. After fully charging, place it on the repair charger for a 24-hour desulfation process, which can restore about 80% of the battery's original capacity.

[CassidyLee]

I've experienced the battery not charging several times. The most common issues are corroded terminals or loose connections. You can clean the metal parts with a wire brush and sand them with sandpaper. If it still doesn't work after cleaning, the battery might be internally damaged, such as sulfation - aged batteries can't hold charge well; in this case, you'll need to replace it. Another possibility is a faulty charger - check if the output current is normal or try a different charger. I recommend riders perform regular maintenance, checking battery condition every 3 months. Don't leave it idle too long in winter as cold temperatures affect performance. If DIY repairs don't work, it's safer to visit a professional shop to avoid riding disruptions.

[VanWalter]

I've gained quite some experience in fixing motorcycle battery issues myself. If it's not charging, it's mostly due to faulty connectors. If the terminals are oxidized, pour some white vinegar to let it react for a few minutes before wiping clean. Then test the voltage - if it's below 12 volts, it might indicate internal short circuits or aging problems in the battery. If the charger is broken, try replacing it with a matching model; or if there are broken wires, patch them up with tape for temporary use. Of course, not every problem can be DIYed - if it's beyond your capability, don't force it and opt for professional repair for safety. Regular checks can also save some repair costs and give you peace of mind while riding.

[Menezes]

If the battery won't charge, address it immediately to prevent short-circuit risks. First, turn off the engine and inspect cables for damage or melting signs. Then verify if the charger settings are correct, such as proper voltage matching. If cleaning the terminals doesn't help, the battery likely needs replacement—don't delay. Also, avoid leaving the battery uncharged for extended periods to prevent damage. Quick action prevents major issues.