How To Charge Lipo Batteries Safely. A hot pack could ignite. Never discharge a lipo battery below 3.0v per cell.
For 2x 4s batteries, the charger must work with at least 8s) you must create a balance lead adapter (and separate main discharge lead adapter) that combines the leads from the batteries into one. Never try to use damaged or puffed up lipo batteries. Set your charger to the storage setting and plug the battery in until it’s finished.
Charge your lipo battery pack at 5c or less on the lipo setting only.
The ideal surface for charging and storing lipo batteries is concrete or ceramic. Set your charger to the storage setting and plug the battery in until it’s finished. They can be used safely… just like gasoline can be used safely but to do so you must. It can even charge the newest life batteries that some use for receiver packs in airplanes and cars.