Motorcycle Battery Voltage Too High

Battery voltage too high.

Motorcycle battery voltage too high.

We call this the open cell. A healthy 12 volt motorcycle battery should maintain a range from 9 5 10 5 volts under the load for a good 30 seconds straight. It should be between 12v and maybe 14 8v max. Yes a bad regulator will cause your motorcycle battery to be overcharged.

You don t say whether this is on the bike or on mains charge. If the battery begins to hold and then steadily drops in voltage there is a problem. Gassing is bad for the battery and also potentially for you as the gasses are explosive. Can t do better than that.

In order to get maximum battery life proper charging voltage must be maintained. The 16v you describe is definitely too high for charging a 12v battery 14 4 volts is a suggested maximum. The old one usually read 12 5 v give or take on a dmm. With a voltage between 12 and 15 8 volts dc.

If the voltage instantly drops to 0 volts that is also a problem. The only other battery i ve used for my bike was a regular lead acid battery. Measure the battery voltage while the engine is running. This is a common failure because of the way motorcycle alternators work.

That voltage seems a mite high. One item of note. If you see something like that right after you charge your battery when re testing you might want to turn the headlights on for 30 seconds or so and re test because batteries can keep a superficial surface charge revzilla photo. I just recently got a new agm battery for my bike this one.