The Efest LUC Blu4 is a 4-bay charger for lithium-ion batteries up to size 18650. With informative display and Android/iOS smartphone app or simple 1-button operation directly on the device. The informative display of the Efest LUC Blu4 shows the actual battery voltage and the charging current of the selected slot and can thus replace measuring with a multimeter in many cases.
Efest LUC Blu4 – Li-Ion battery charger with smartphone app
Four large LEDs show the status of all bays at a glance (red = charging, green = full). Even more information incl. charging curve is shown by the Efest “BLU4” app available free of charge in the respective app store (for Android from version 4.3+ and iOS from version 7+). When charging is complete, a message appears on the app.
The battery voltage at a glance:
The informative display of the Efest LUC Blu4 shows the actual battery voltage and the charging current of the selected slot and can thus replace measuring with a multimeter in many cases. Four large LEDs show the status of all slots at a glance (red = charging, green = full). Even more information incl. charging curve is shown by the Efest “BLU4” app, which is available free of charge in the respective app store (for Android from version 4.3+ and iOS from version 7+). When charging is complete, a message appears on the app.
The following Li-Ion battery types can be charged with the Efest LUC Blu4:
10440 / 14500 / 14650 / 16340 / 16650 / 17500 / 17650 / 17670 / 18350 / 18490 / 18500 / 18650 3.6V and 3.7V Li-ion batteries (IMR, INR & ICR).
Notes from battery parts: Please note: Very small batteries (10440 / 14500 / 15340) should only be charged with a reduced charge current of 0.5A, a charge current of 1A could lead to overstressing these small cells in the long run.
Efest LUC Blu4 product information:
- 4 independent charging bays for lithium-ion batteries up to size 18650
- for Li-Ion industrial cells INR, IMR & ICR (nominal 3.6V – 3.7V) up to charge end 4.20V
- Display with indication of actual battery voltage
- Bluetooth 4.0 app for Android & iOS
- 2 charging currents: 4 * 0.5A or 2 * 1A maximum
- Safe reactivation of deeply discharged batteries from 0.6V with reduced charging current.
- Automatic restart of the charging process if the voltage of a battery remaining in the charging tray falls below 4.1V.
- Supplied EU mains adapter 12V/1A (100V – 240V 50/60Hz).
- Safe thanks to reverse polarity, short circuit, overvoltage & overcharge protection.
- RoHS & CE certified
Instruction manual:
Efest LUC Blu4 on the Efest homepage.Test report by Mooch in the ECF Forum
Highlights:
Scope of delivery: Charger, power supply unit
Technical Data
| Input | DC 12V, 1A |
| Charging current | 0.5A * 4 or 1A * 2 |
| Charging end voltage | 4.20V ± 0.05V |
| Termining | 0,1C |
| Restart charge | 4.10V ± 0.1V |
| Operating temperature | 0 °C |
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