Test/Review of Charger Panasonic BQ-CC17

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HKJ
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Test/Review of Charger Panasonic BQ-CC17
Charger Panasonic BQ-CC17

DSC_8972

DSC_8976 DSC_8975

Panasonic has a line of NiMH chargers, some are fast and smart, others dump. This one here is a slow and smart charger.

DSC_8966 DSC_8967

I got the charger in a blister pack. In addition to the charger there were eneloop cells.

DSC_8970

The makes the total contents: The charger, 4 eneloop cells and an instruction sheet in many languages.

DSC_8973 DSC_8974

The charger is designed with a US power plug but includes a EU plug. The EU plug requires tools to remove.

DSC_8983

The charger has four hidden leds to show when it is charging. Green light means charging.

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DSC_8977

The charger has the typically two level slots used for AA and AAA batteries.

supportedBatteryTypes

supportedBatterySizes DSC_8981 DSC_8978



Measurements charger
  • When not powered it will discharge the battery with 0.05mA
  • If the charger detect an error the green led for that channel will flash fast.
  • Steady green light is charging.
  • Charge will restart charging after power loss, or battery insertion.


Panasonic%20BQ-CC17%20(eneloop)%20%231

A nice -dv/dt termination with only a small temperature increase and no trickle charge, this looks very good.

Panasonic%20BQ-CC17%20(eneloop)%20%232
Panasonic%20BQ-CC17%20(eneloop)%20%233
Panasonic%20BQ-CC17%20(eneloop)%20%234

All channels looks the same.

Panasonic%20BQ-CC17%20(eneloopXX)%20%231

The XX also looks the same, but the internal resistance is fairly high, making the voltage swing fairly large when the charge current is pulsing.

Panasonic%20BQ-CC17%20(eneloopPro)%20%231
Panasonic%20BQ-CC17%20(powerex)%20%231

Again nice terminations.

Panasonic%20BQ-CC17%20(eneloopAAA)%20%231

Also with the AAA cell.

Panasonic%20BQ-CC17%20full%20(eneloop)%20%231

The termination is a bit slow on a full cell. It looks like a -dv/dt termination.

Panasonic%20BQ-CC17%20(4xeneloop)

With 4 cells in the charger the termination is not as nice, but still very good.

Temp1676

M1: 31,9°C, M2: 36,4°C, M3: 39,7°C, M4: 39,5°C, M5: 44,3°C, M6: 35,0°C, HS1: 66,9°C
The charger does not have an even temperature distribution, but the temperature is acceptable.

Temp1677

M1: 31,7°C, M2: 36,2°C, M3: 40,0°C, M4: 39,3°C, M5: 47,5°C, HS1: 71,7°C

Startup

The charger needs about 0.5 seconds to start.
The duty cycle is 25%, i.e. the charger has one charge circuit and switches it between the four slots.

ChargeAAA

With AAA the current is the same, but the duty cycle is reduced.


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



Conclusion

The charger is very good at filling the batteries. No trickle charge is an advantage for LSD cells. Compared to the CC16 this one only has one charger circuit, the CC16 has two. With AA batteries the CC16 reduces the actual current, this one changes the duty cycle, but due to the lower current there is not much difference in the charge current in the pulses.


I believe this is a good but slow NiMH charger.



Notes

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

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

Edited by: sb56637 on 06/25/2015 - 14:21
hank
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I’m pretty sure that’s right — 1, 2, 3, or 4 cells
and less sure it can take both AA and AAA at the same time?

I’m also curious with all these AA/AAA chargers what you think of using them for C, D, or 4/3A NiMH cells (connecting with alligator clips/magnets)
I know it would be slow at best.

I also saw somewhere* an adapter that would slip into an AA slot to hold a C or D cells
_____
Edit: everywhere: https://www.google.com/search?q=charger+adapter+AA+to+hold+C+or+D+cell

HKJ
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hank wrote:
I'm pretty sure that's right -- 1, 2, 3, or 4 cells and less sure it can take both AA and AAA at the same time?

I do not test it, but there is no reason for it not to.

I do have some other chargers in queue where it might give problems and there I will probably test it.

hank wrote:
I'm also curious with all these AA/AAA chargers what you think of using them for C, D, or 4/3A NiMH cells (connecting with alligator clips/magnets) I know it would be slow at best. I also saw somewhere* an adapter that would slip into an AA slot to hold a C or D cells

With a larger cell the -dv/dt signal gets smaller and the charger will probably miss it, this means it must terminate on voltage and with larger batteries and fairly small charge currents it might have problem to get the voltage high enough for termination. You will have to test it with each battery type (Different brand is a different type).

Alligator clips/magnets and resistance, but this can mostly be ignored because the charger measures with current off (Charge current might be slightly lower, depending on the charger).

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

SIGShooter
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hank wrote:
I’m pretty sure that’s right — 1, 2, 3, or 4 cells
and less sure it can take both AA and AAA at the same time?

I’m also curious with all these AA/AAA chargers what you think of using them for C, D, or 4/3A NiMH cells (connecting with alligator clips/magnets)
I know it would be slow at best.

I also saw somewhere* an adapter that would slip into an AA slot to hold a C or D cells
_____
Edit: everywhere: https://www.google.com/search?q=charger+adapter+AA+to+hold+C+or+D+cell


I have one of these and it can definitely charge any combination of AA or AAA cells. Based on my DMM readings and some discharge tests with my Opus after they come off the charger they seem to charge fine.
Hugh Johnson
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Reviving this thread because it’s still relevant. It seems that this is the most commonly available charger in my area. It’s packaged with 4 AA’s everywhere from Costco to independent battery stores. I just bought it with 4 regular Eneloops.

I charged a single battery and it terminated at 1.45 volts. I then charged 4 batteries and it terminated at 1.42 volts. These batteries are in regular rotation and my Liitokala Lii500 normally charges then to about 1.5 to 1.51 volts.

arow55
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Hugh Johnson wrote:
Reviving this thread because it’s still relevant. It seems that this is the most commonly available charger in my area. It’s packaged with 4 AA’s everywhere from Costco to independent battery stores. I just bought it with 4 regular Eneloops.

I charged a single battery and it terminated at 1.45 volts. I then charged 4 batteries and it terminated at 1.42 volts. These batteries are in regular rotation and my Liitokala Lii500 normally charges then to about 1.5 to 1.51 volts.


Is that good or bad? For us with less knowledge.
Hugh Johnson
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I’m not the best person to answer but it should result in better battery longevity. The downside is that you never start with a fully charged battery

cyclops
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Whoa, stumbled on this thread today. Last month I got the eneloop kit from amazon and this is the charger which was included. Never knew it was so old model. But it seems to be working great!