How Should You Safely Charge 11.1V LiPoly Batteries?

Use balance chargers with CC/CV (constant current/voltage) protocols:

How to Prevent Lithium-Ion Battery Fires and Explosions

• Max charge rate: 1C (e.g., 5A for 5000mAh pack)
• Storage voltage: 3.8V-3.85V per cell
• Never exceed