Charger Crelant CD80





This is a universal charger, i.e. it can do LiIon and NiMH batteries in a couple of sizes.


The charger comes in a retail box. There is some specification on the box.



The pack contained the charger, a mains led and a instruction sheet.



The charger has universal mains (100-240VAC 50/60Hz) and 12VDC input.



The user interface is two leds, one for each channel. They are red while charging and green at all other times.
The cosmetics is not that good, the sticker with the brand name looks like it will fall off soon and on of the leds are considerable lower then the other led.



The battery slot are the slider construction.
It handles batteries form 31.4 to 75mm.









The current is on the high side for smaller batteries.



Measurements

• Power consumption when idle is 0.6 watt
• Between 0V and 1.9 volt the charge will use NiMH charging
• Above 2V the charger will use LiIon charging.
• When charger is without power it discharge the a LiIon with about 1.3mA and a NiMH with 0.4mA.
• If the battery voltage drops the charger will resume, both on LiIon and NiMH, but led stays green.
• Charge will restart charging after power loss, or battery insertion.

Charging LiIon



The charger uses constant current when charging and has no CV phase, this usual means the batteries will be undercharged. This is not the case here because the charger uses a fairly high charge voltage and with the fairly low charge current the batteries is fully charged when the charger tops. If the voltage drops too much it will add a boost at full charge current.



The second slot is the same.




These are charged the same way.



This battery has a high internal resistance and the charge voltage goes way above the alloweable limit (Notice the changed voltage scale on the chart).



This cell is fully charged in first try.



Due to the high internal resistance in this cell the charger continue to give it small charge pulses.



The charger maintain full charge current with two cells.



With external 12V supply the charge speed is about the same and the current consumption is about 700mA.



M1: 41,4°C, M2: 41,8°C, M3: 48,8°C, M4: 46,5°C, M5: 50,0°C, HS1: 55,5°C



The charger needs about 4 seconds to start and measures the voltage with current off.



Charging a old cell (High internal resistance) shows that the charger do not limit the charge voltage to safe levels.



Charging NiMH



The charger terminates before the battery is fully charged, but puts a few more burst into it, this do not fill the cell.



It is the same on the second channel.





And the high capacity batteries is handled the same way.



The AAA is also a bit below a full charge.



The full cell is termnated quickly.



The charge current is the same with two cells in the charger.



With external power supply the charge speed is the same and the current consumption is about 400mA



M1: 41,2°C, M2: 41,6°C, M3: 50,5°C, M4: 40,7°C, HS1: 67,3°C



The charger needs about 2.5 seconds to start and measures the voltage with current off.



Testing the charger with 2500 volt and 5000 volt between mains and low volt side, did not show any safety problems.



Conclusion

This is one of the few chargers that support large batteries (D & 32650), but I do not like it.
With LiIon it uses the wrong algorithm and too high charge voltage and with NiMH it do not fill the batteries. While doing IR photos it charged the NiMH batteries in less than an hour, i.e. less than 600mAh before it reported full.



Notes

The charger was supplied by Banggood for review.

Here is an explanation on how I did the above charge curves: How do I test a charger