Note

• Caution 1: When connecting batteries for the first time, check the LED indicator. If the LED lights up, the battery is connected in reverse. Do NOT charge when batteries are reversed.

• Caution 2: The board may not output power on first battery connection. Press the BOOT button on the PCB to activate the battery-protection IC.

• Caution 3: Charge only with the supplied 12.6 V 2 A adapter. Using other chargers may cause excessive ripple or instability and damage the unit.

• Caution 4: Do not use the product if the positive-terminal insulating pad is missing or damaged—risk of short-circuit and fire. When removing batteries, pry from the negative terminal only; never pry the positive end with a screwdriver.

Warning

⚠️ Lithium Battery Usage Warnings

1. Fire & Injury Risk Li-Po/Li-ion cells are highly unstable; improper charging or use can cause fire, personal injury, or property damage.

2. Polarity & Charger Never reverse polarity when charging or discharging. Use only high-quality chargers/charging boards designed for lithium batteries.

3. Battery Mixing Do not mix old and new cells or combine cells from different brands.

4. Replacement Batteries When purchasing new batteries, verify their specifications are compatible with the expansion board. Select reputable manufacturers and perform aging tests to ensure safe, stable operation.

5. Cycle Life Lithium cells have a limited cycle life. Replace them after two years of use or when their rated life is reached, whichever comes first.

6. Storage Store batteries in a secure location, away from flammable or explosive materials and out of reach of children to prevent accidents.