My charger seems to be charging volt on storage and it supposed to go to only and 7.2 or ehrte ever but not full.Is there a way to set the end voltage on the IMAX b6ac my lipo where 3.78 and it kept charging. .shouldn't storage be discharge. My end volts says 8.4 that would fully charge mt battery.. I have a 5200mah 7.2 volt 2s