USB Charger for Ni-Mh, Ni-Cd Batteries, SM-2P

Installation and Connection

1. Power Connection

• Insert the USB connector of the charger into a 5 V USB power source (computer, power bank, or wall adapter with a minimum output of 0.5 A).
• The charger does not indicate power when no battery is inserted – the LED will light up only after the battery is connected.

2. Correct Battery Connection

• Use a Ni-Cd/Ni-MH pack with an SM-2P connector.
• Make sure the contacts are clean and undamaged.
• Fully insert the battery connector into the charger port.

3. Start of Charging

• Once the battery is correctly connected, the red LED will light up – charging is in progress.

Operation and LED Indicator Behavior

• Active charging (bright red)
  During this state, the charger supplies power to the battery with a safe maximum current of approximately 200–250 mA.

• Charging complete (dim red)
  After reaching full voltage, the intelligent control circuit reduces the charging current to maintain the battery without overcharging.

Tips for Optimal Operation

1. Placement

• Place the charger horizontally on a firm, non-flammable surface.
• Ensure proper air circulation – do not place it in enclosed boxes or under a blanket.

2. Operating Temperature

• The device operates within a temperature range of 0 °C to +40 °C.
• If the charger becomes hot during operation, disconnect the battery and allow it to cool down.

3. Charging Time

• Do not leave the battery connected unattended for more than 48 hours.
• Regularly check that the LED indication corresponds to the expected state (bright vs. dim).

4. Contact Maintenance

• Clean the contacts regularly with a dry cloth to remove dust and dirt.
• Prevent corrosion – store batteries in a dry environment.

Safety Warnings

1. Use Only Specified Batteries

• The charger is designed exclusively for Ni-Cd and Ni-MH packs with an SM-2P connector.
• Always charge with the voltage required by the battery.
• Never connect other types of batteries (Li-ion, lead-acid, AA, etc.).

2. Overload and Short-Circuit Protection

• Thanks to the intelligent IC circuit, the risk of overload or short circuit is minimized.
• Ensure that contacts are not damaged or bent to prevent short circuits.

3. Prevent Overheating

• Do not place the charger on soft materials (pillows, blankets).
• Do not cover it so that heat can dissipate freely.

4. Dry Environment

• Do not expose the charger to water, rain, or high humidity.
• In humid conditions, there is a risk of short circuit or contact corrosion.

5. Regular Battery Inspection

• If the battery overheats, swells, or emits unusual sounds, stop charging immediately.
• Dispose of defective batteries responsibly according to local regulations.

6. Charging Supervision

• Do not place the charger on flammable surfaces (paper, fabric).
• Never leave children or animals unattended near the charger during operation.

EU Importer: AMPUL SYSTEM s.r.o., Čsl. armády 641/40, 78701 Šumperk, Czech Republic,