Cells can be charged and discharge in parallel is larger capacity packs are required. 1600mAh, 102g 1600mAh packs can supply twice the current of 800mah packs Test Data Typical slow flier flight times of 20-30 minutes. The current must then shut off - not float. Peak detecting will damage the cells. A special charger or laboratory supply is required.
Charger is avaiable here .
Discharging The manufacturer specifies 2A max current. Some fliers are using them at up to 3.5A, but the long term effects of this are unknown. Never discharge below 2V per cell except for short periods under high loads. Soldering The cell ends do not take solder well. Use the tabs for pack construction.