Here are some important precautions to take while charging lithium-ion devices:
Stick to the manufacturer’s battery and charging equipment
Disconnect the charger once your battery is fully charged
Avoid overheating issues by letting your device cool down for a few minutes after heavy usage before you charge it
Charge a single battery at a time to avoid overloading the circuit
Do not expose the battery to extreme temperatures and moisture
Charge the batteries only when the temperature is between 32°F to 105°F
Keep them away from direct sunlight
Plug in your battery for a recharge before it drops below 10 percent to avoid burning through its charge cycles quickly