Weak car/motorcycle battery, phantom discharge or failing alternator? As a ban-aid solution you could try a solar maintainer to help prevent battery from dying. Also use it as a preventative measures to keep good batteries topped up. The Solar Maintainer (rebranded SunForce) I got is weather & shatter proof. Comes with a cigarette adapter, alligator clamp and o-ring connectors with a fuse. Hook through cigarette port or directly to the battery.