Lithium ion batteries are in laptops, cell phones, iPad and most consumer electronics that are made to be used on the go. Like DJI Intelligent batteries, they come in various shapes, sizes and capacity. The chemistry of a battery differs from one to another, but they do the same task; provide power when required. Lithium polymer battery voltage varies between 2.7 -3V(discharged) to about 4.2V(fully charged)

Lithium ion batteries have a long life, but they hold a charge better and they are lighter and operate at higher voltage. One cell of lipo battery is 3.7 volts. Batteries in series (in daisy chain) allows the voltage to be increased. Sometimes, they are designated as follows:

1 lipo cell is designated as 1s

2 lipo cell is designated as 2s

They can burst into flames and this can be disastrous. A recent example is the Samsung Note 7 debacle.

Lipo Battery Flaws

• They are sensitive to high temperatures.
• If completely discharged, it is ruined.
• If they fail, they burst into flames

DJI Intelligent Battery

The DJI intelligent flight battery is a smart battery with electronic features to prevent most of these flaws. The DJI fly app will display a warning prompt when a damaged cell is detected

The DJI intelligent batteries is constructed with smart charging and discharging functionality. It takes about 1hr 35mins to charge.

When the battery is not used, the battery is designed to discharge to 96% of the battery level. After 5 days, it automatically discharges to 60% when it sits idle.

The DJI intelligent battery has overcharging protection. It stops charging once fully charged. The temperature protection in the battery is designed to charge in an environment that is between 5 and 40°C.

If the battery is less than 5% and you do not charge it and it sits idle for 6hours, it enters hibernation mode. The battery level indicators do not illuminate. Charge the battery to wake it up from hibernation

• The 4 led indicators on the battery shows the level of charge in the battery.

• All led full and not blinking represent a battery level greater than 88%

A flashing led at:

• 12 0 clock represent battery level between 75 and 88%
• 9 o clock represent battery level between 50 to 63%
• 6 o clock represent battery level between 25 to 38%
• 3 o clock represent battery level 0 to 13%

DJI Intelligent Battery Charging

• Do not charge the battery after flight as the temperature of battery is too high. Wait until it cools to room temperature

• The charger stops charging if the battery cell temperature is not between 5 to 40

• Charge the battery fully to maintain battery health

• Discharge the battery to at least 30%

DJI Intelligent Battery protection mechanism

• Battery capacity is significantly reduced in low temperature environments of -10 to 5. Hover the aircraft in place to warm the batteries
• Do not use the batteries in temperature environment lower than -10
• Observe the battery temp to ensure it is above 20
• Wind speed resistance performance is reduced when the battery capacity is low

Reference: DJI Mavic Air 2 Manual v1.2 2020.06