Like others have said, I wouldn't even really worry about it, because I'd never let it drop below the solid red level. That's when I recharge mine. Of course, if I was doing some huge ride, I might charge it up anyway, regardless of the level, just to be safe, but normally I run it to solid red, then recharge. I'm not sure if these batteries have a "memory" and need to be discharged as much as possible before recharging, but I figure the solid red indicator is close enough for me. Not worth having it die on the road.