OK so I got one last week but didn't finally get around to trying it out until today. I have a Superbrain 959 that I'm using to charge the battery. On the back of the battery it says to set it at .3 amps for maximum life. The 959 only has settings from .5-4.5Amp. So I set it at .5 and didn't change any other settings. Plugged it in and it charges to what should be a full charge, but doesn't beep to indicate it's done. I tried it any way(after about 20 mins) and my run time seems reeeeeeeal short, only about 5 minutes maybe. I have an RC18R with a similar battery pack and I'm getting about 10mins(I also don't change any settings and just let the charger detect the settings). So what are other people getting? Charger settings? I might try the crappy wall charger just to see how that runs. I'm just wondering if it's a battery issue or a charger issue. I've had the charger for a while and haven't used it much in the past year(just haven't had the time).