Hi, It's not clear what type of cells you are using. So will try to answer all the questions.

NiCds should be discharged down to 1.0V per cell so that they will deliver full capacity without
gaining memory. Simply, they are prone to discharge their currant to the last recharge place. Over time the gain memory and you loose their whole output if left unchecked. This is old tech.

NiMH have no memory and you need not discharge them down. Use and charge the cells
without worry. Slow charging [100 -200mA] is best as the cells will absorb more currant than
quick charging. High currant tends to overheat cells and shorten the battery life.

If overnight charging is not doing it for you increase the charge rate accordingly by increasing the charge output 100mA at a time. Remember less is better. Warm to the touch is charged and hot is overcharged.

We offer Tx and Rx packs that will let you fly all weekend without recharging.

Hope this helps you. If you need more help contact me. Good luck.

Bern [www.superbatterypacks.com]