Dlyfull M8 Battery Charger

DSC_1543

DSC_1544 DSC_1545

This is 8 channel charger from Dlyfull that can charge most battery types.

DSC_1511
DSC_1512
DSC_1513
DSC_1514

The charger arrived in a brown cardboard box with a drawing of the charger and a list of supported batteries.

DSC_1533

The box included the charger, a 12V power supply and a manual.

DSC_1546

The charger is powered from the supplied 12V supply.

DSC_1542

The power adapter is rated for 12V 3A.

DSC_1547

The user interface contains 2 buttons and a LCD display.
When a LiIon battery is put into a slot a short press on the MODE button will select voltage.
Holding down MODE during operation allows selection of current, this make is a bit cumbersome to change current.
SLOT is used to select battery.
Holding down SLOT will restart slot with a new LiIon voltage selection.

DSC_2249

All segments

DSC_2251

Charging a LiIon battery in slot #2.

DSC_2250

Charging a NiMH battery in slot #5.

DSC_1548

The back has the usual specifications, but is rather hard to read.

DSC_1549 DSC_1551

The connection are the common slider style that can handle from 31mm to 77.8mm, this handles all normal sizes of LiIon and NiMH cells, protected or not.

DSC_1550

There is also connectors for two 9V batteries. They do not use the display, but have a red/green led each. It shows red while charging and green at all other times.

supportedBatteryTypes

supportedBatterySizes DSC_1567 DSC_1568
DSC_1569


DSC_1571 DSC_1572
DSC_1573 DSC_1574



Measurements charger

    Charging LiIon 4.2V
    Charging LiIon 4.35
    Charging LiIon 3.6V
    Charging NiMH
    Charging 9V

Charging LiIon 4.2V

Dlyfull%20M8%200.5A%20%28SA18650-33%29%20%231

The charger has a nice CC/CV charge curve and about 100mA termination current.
Display shows: 3119mAh

Dlyfull%20M8%200.5A%20%28SA18650-33%29%20%232

Display shows: 3096mAh

Dlyfull%20M8%200.5A%20%28SA18650-33%29%20%233

Display shows: 3066mAh

Dlyfull%20M8%200.5A%20%28SA18650-33%29%20%234

Display shows: 3110mAh

Dlyfull%20M8%200.5A%20%28SA18650-33%29%20%235

Display shows: 3095mAh

Dlyfull%20M8%200.5A%20%28SA18650-33%29%20%236

Display shows: 3078mAh

Dlyfull%20M8%200.5A%20%28SA18650-33%29%20%237

Display shows: 3212mAh

Dlyfull%20M8%200.5A%20%28SA18650-33%29%20%238

All slots look similar.
Display shows: 3191mAh

Dlyfull%20M8%200.5A%20%28SA18650-26%29%20%231

Display shows: 2626mAh

Dlyfull%20M8%200.5A%20%28PA18650-31%29%20%231

Display shows: 2853mAh

Dlyfull%20M8%200.5A%20%28BE18650-26%29%20%231

Other capacities looks fine.
Display shows: 2158mAh

Dlyfull%20M8%200.5A%20%28KP14500-08%29%20%231

The 14500 cell also looks fine.
Display shows: 1005mAh

Dlyfull%20M8%200.2A%20%28SA18650-33%29%20%231

Any cell can be charged with 0.2A, but it can take a long time.
Display shows: 3119mAh

Dlyfull%20M8%200.2A%20%28AW18350-IMR%29%20%231

No problem with my old and very worn down cell.
Display shows: 74mAh

Dlyfull%20M8%201A%20%28SA18650-33%29%20%231

Increasing the current to 1A works fine.
Display shows: 3168mAh

Dlyfull%20M8%202A%20%28SA18650-33%29%20%231

2A also works fine, the termination current is unchanged.
Display shows: 2976mAh

Dlyfull%20M8%200.8A%20%288xSA18650-33%29

With 8 cells the maximum charge current is 0.8A
Display shows: 3010mAh, 2746mAh, 2938mAh, 3062mAh, 2948mAh, 3044mAh, 3041mAh, 3084mAh

Dlyfull%20M8%200.8A%2012V%20%288xSA18650-33%29

And the charger can use up to 3A from 12V
Display shows: 2872mAh, 2879mAh, 3061mAh, 2620mAh, 2967mAh, 2963mAh, 3077mAh, 2974mAh

Temp7433

HS1: 52.2°C

Temp7434

M1: 35.9°C, M2: 36.5°C, M3: 38.3°C, M4: 38.4°C, M5: 36.8°C, M6: 36.6°C, M7: 34.9°C, M8: 31.9°C, M9: 41.2°C, HS1: 43.8°C

PoweronLiIon

The charger needs about 10 seconds to turn on, partly because it waits for user input.

Unpowered%20voltage%20sweep

A full LiIon battery will be discharged with 1.3mA when the charger is without power.



Charging LiIon 4.35

Dlyfull%20M8%200.5A%20%28LG18650-30%29%20%231

Using 3.8V setting will charge to 4.35V
Display shows: 2971mAh



Charging LiIon 3.6V

Dlyfull%20M8%200.5A%20%2818650-LiFePO4%29%20%231

The LiFePO4 setting charges to 3.65V
Display shows: 1225mAh



Charging NiMH

Dlyfull%20M8%200.5A%20%28eneloop%29%20%231

This NiMH charging looks like a voltage termination, there is a small trickle charge.
Display shows: 1880mAh

Dlyfull%20M8%200.5A%20%28eneloop%29%20%232

Display shows: 1992mAh

Dlyfull%20M8%200.5A%20%28eneloop%29%20%233

Display shows: 2158mAh

Dlyfull%20M8%200.5A%20%28eneloop%29%20%234

Display shows: 2127mAh

Dlyfull%20M8%200.5A%20%28eneloop%29%20%235

Display shows: 1930mAh

Dlyfull%20M8%200.5A%20%28eneloop%29%20%236

Display shows: 1949mAh

Dlyfull%20M8%200.5A%20%28eneloop%29%20%237

Display shows: 2046mAh

Dlyfull%20M8%200.5A%20%28eneloop%29%20%238

The other slots looks like -dv/dt termination
Display shows: 1975mAh

Dlyfull%20M8%200.5A%20%28eneloopPro%29%20%231

Display shows: 2649mAh

Dlyfull%20M8%200.5A%20%28fujitsu%29%20%231

Display shows: 2556mAh

Dlyfull%20M8%200.5A%20%28leise25%29%20%231

With the high capacity cells there are tow -dv/dt and one voltage termination and all batteries looks full.

Dlyfull%20M8%200.5A%20AAA%20%28eneloop%29%20%231

The AAA cell is handles nicely on 0.5A
Display shows: 778mAh

Dlyfull%20M8%200.2A%20%28eneloop%29%20%231

The charger also terminated A AA NiMH with a 0.2A charge, but was a bit slow to do it.
Display shows: 2586mAh

Dlyfull%20M8%200.2A%20AAA%20%28eneloop%29%20%231

Oops, for some reason the termination do not work this time around. Using 0.2A for a AAA cell is on the low side, there is no -dv/dt signal on the charge curve.
Display shows: 5696mAh

Dlyfull%20M8%200.5A%20full%20%28eneloop%29%20%231

Termination on a full cell can be a bit slow.
Display shows: 259mAh

Dlyfull%20M8%201A%20%28eneloop%29%20%231

Using 1A works fine.
Display shows: 1894mAh

Dlyfull%20M8%201A%20%288xeneloop%29

Charging 8 cells at 1A also works fine.
Display shows: 1825mAh, 1791mAh, 1841mAh, 1910mAh, 1821mAh, 1892mAh, 1854mAh, 1838mAh

Dlyfull%20M8%201A%2012V%20%288xeneloop%29

It uses nearly 2A peak from the 12V supply.
Display shows: 1765mAh, 1763mAh, 1793mAh, 1811mAh, 1800mAh, 1835mAh, 1841mAh, 1839mAh

Temp7439

HS1: 65.6°C

Temp7440

M1: 34.7°C, M2: 38.2°C, M3: 39.1°C, M4: 38.0°C, M5: 37.8°C, M6: 36.8°C, M7: 34.0°C, M8: 30.7°C, HS1: 50.0°C

PoweronNiMH

The charger is considerable faster to start with NiMH, it do not have to wait for user input.

TrickleChargeNiMH

The trickle charger is current pulses. On time is 2 seconds every 20.5 seconds with an average current of 60mA, i.e. the trickle charge current is about 6mA. This is a acceptable level.


Charging 9V

Dlyfull%20M8%20%289V%29%20%231
Dlyfull%20M8%20%289V%29%20%232

The current is about 30mA.

Voltage%20sweep%209V

The 9V also uses pulsing current and can deliver nearly 11V, current is fairly constant at any voltage.


Testing with 2830 volt and 4242 volt between mains and low volt side, did not show any safety problems.



Conclusion

The charger works nicely charging the different battery types and has a wide selection of current available, but it is not really a super fast charger. Changing current is a bit on the slow side, especially with LiIon where you have to wait until the voltage selection times out and then hold down the button to enable current selection.

I will rate it as a good charger, even though it failed on a single NiMH cell.



Notes

The charger was supplied by a DlyFull for review.

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