Evaluating Charge State of Various AA and AAA Batteries with Tronic Universal Charger

Hello.

At the beginning I will mark that I am completely green with electronics, that's why my colleague recommended this forum to me.

And now to the point:

My dad has some AA and AAA batteries with different capacities:

AA:
Energy 1700 mAh 1.2 V
Energizer 2000 mAh 1.2 V
Tronic Energy 2500 mAh 1.2 V
One no-name 4300 mAh 1.2 V
In addition, I bought it in Lidl yesterday
Tronic 2300 mAh 1.2 V

AAA:
TESCO greener living 850 mAh 1.2V pieces 2
Viopow 900 mAh 1.2V - 3 pieces
Tronic 900 mAh 1.2V - 2 pieces
And yesterday purchased:
Tronic Eco 950 mAh 1.2V - 4 pieces

In addition, I bought the charger for them also in Lidl
Tronic Universal battery charger TLG 500 B1

PRI: 100-240V ~ 60 / 50HZ 150mA
SEC: 3.34VA (max)
(1-2) X (1.4V -... 1000mA)
(3-4) X (1.4V -... 500 mA)
2 X (9V -... 300mA)

I have included charging AA batteries and what's the most interesting after just 1 hour the green LED on the charger has been lit - they are a bit weird - it's a bit strange for me that it's so fast

I have at home such a tester for batteries and accumulators and actually after inserting it shows 1.2V - 1.4V on 1.5V batteries on the battery but of course this battery has 1.5V.

I also tried to measure them with the help of the meter but here the fun begins to be unintelligible for me.

Namely, I know that red is a plus, a black minus, I set on the meter 20V and V -... (this is a dash and below it (...).

And here the values he gets given in brackets.

Energy 1700 mAh 1.2V - (1.75V)
Energizer 2000 mAh 1.2V - (1.94V)
Tronic Energy 2500 mAh 1.2V - (2.00V)
One no-name 4300 mAh 1.2V- (1.98V)
In addition, I bought it in Lidl yesterday
Tronic 2300 mAh 1.2 V -
(2.08V)
(2.10V)
(2.10V)
(2.12V)

AAA:
TESCO greener living 850 mAh 1.2V pieces 2
(2.14V) and (2.07V)
Viopow 900 mAh 1.2V - 3 pieces
(1.64V) (1.45V) (1.48V)
Tronic 900 mAh 1.2V - 2 pieces
(1.46V) (1.90V)
And yesterday purchased:
Tronic Eco 950 mAh 1.2V - 4 pieces
I do not know which one I have not opened yet but the producer ensures that they have 75% of the power to start.

Attached my meter
IMG_201703...145937.jpg Download (4.03 MB)

Do I do something wrong or the results are good, how to check it out, I am asking you for help and thank you for every support

From the description of the charger it appears that it detects the charge, so probably the rechargeable batteries charged for an hour - maybe they were partially charged, maybe they have a small capacity ...

And what about the meter, you checked what voltage shows for a regular 1.5V battery? For the new one should be around 1.6V, maybe even a bit more - but not more than 2V. Unless it's damaged.

Compare the indications of this meter with some other best-better. If you have so many batteries and you use them a lot, then buy a microprocessor charger.
You can determine approximately the amount of stored energy by measuring the voltage drop under load, but the most reliable results would give a controlled discharge process.

Maxellek wrote:

no-name 4300 mAh

Unbelievable . If you do not have a device powered by 1 battery, it is best to dispose of it or put it in a garden solar lamp.

For a new battery, the meter set as in the picture above indicates:
(2.42V)
The battery is BATT EXTRA AA 1.5V

Added after 1 [minutes]:

D214d3k wrote:

Compare the indications of this meter with some other best-better. If you have so many batteries and you use them a lot, then buy a microprocessor charger.
You can determine approximately the amount of stored energy by measuring the voltage drop under load, but the most reliable results would give a controlled discharge process.

Maxellek wrote:

no-name 4300 mAh

Unbelievable . If you do not have a device powered by 1 battery, it is best to dispose of it or put it in a garden solar lamp.

Unfortunately, I do not have another meter at home, so I can not compare

As for the battery, thank you for the suggestion

D214d3k - this charger is probably a microprocessor (unless they lie in the description).

For a new battery, the meter set as in the picture above indicates: (2.42V)
The battery is BATT EXTRA AA 1.5V

The meter may overstate the indications (and this significantly) if it has a discharged battery - try to replace it with a new one.
Especially that the picture shows that the meter shows "battery discharged" ... (lower left corner of the display)

One no-name 4300 mAh 1.2V- (1.98V)

And I bought JIABAC rechargeable batteries a few months ago, 2500mAh AAA - they really do not even have 200mAh, with this no-name can be similar ...

_jta_ wrote:

D214d3k - this charger is probably a microprocessor (unless they lie in the description).

I meant something more advanced with a display but if it loads well and enough it is fine.

I borrowed a meter from a friend and these are the results:
New ones will be given in [] in parenthesis

Energy 1700 mAh 1.2V - [1.498V]
Energizer 2000 mAh 1.2V - [1.475V]
Tronic Energy 2500 mAh 1.2V - [1.494V]
One no-name 4300 mAh 1.2V- [1.468V]
Lidl
Tronic 2300 mAh 1.2 V -
[1.504V]
[1.508V]
[1.508V]
[1.520V]

AAA:
TESCO greener living 850 mAh 1.2V pieces 2
[1.477V] and [1.524V]
Viopow 900 mAh 1.2V - 3 pieces
[1.054V] [1.174V] [1.040V]
Tronic 900 mAh 1.2V - 2 pieces
[1.038V] [1.348V]

Are such results reliable?

Oh, for the battery:
[1.795V]

The meter that I have now:
IMG_201703...230146.jpg Download (4.09 MB)

They look inflated, because the NiMH battery rarely has voltage above 1.5V (well, maybe some freshly charged), and the battery does not have 1.795V - but less than on yours. Look, or does it not give an indication of a "used battery" like yours. And maybe change the battery in yours, and see what voltage will show then?

_jta_ wrote:

They look inflated, because the NiMH battery rarely has voltage above 1.5V (well, maybe some freshly charged), and the battery does not have 1.795V - but less than on yours. Look, or does it not give an indication of a "used battery" like yours. And maybe change the battery in yours, and see what voltage will show then?

The battery in this new one was newly installed before the measurement, so it is probably good

I will next cut and check on this new meter batteries from that.

Added after 1 [hour] 42 [minutes]:

I checked the batteries from my meter on the borrowed and the result is as follows:

Panasonic lrv08 23A 12V MN 21 battery.

On the new meters it shows [6.673V]

As it has 6.67V at nominal 12V, it's no wonder that the meter does not show well. Replace with a new one.

I changed the batteries in my meter and these are the results:
Borrowed (...)
My [...]

Energy 1700 mAh 1.2V - (1.370V) [1.38V]
Energizer 2000 mAh 1.2V - (1.348V) [1.36V]
Tronic Energy 2500 mAh 1.2V - (1.367V) [1.38V]
One no-name 4300 mAh 1.2V- (1.344V) [1.35V]
Lidl
Tronic 2300 mAh 1.2 V -
(1.368V) [1.37V]
(1.372V) [1.37V]
(1.372V) [1.36V]
(1.378V) [1.36V]

AAA:
TESCO greener living 850 mAh 1.2V pieces 2
(1.367V) and (1.390V) - [1.36V] and [1.36V]
Viopow 900 mAh 1.2V - 3 pieces
(0.975V) (1.099V) (0.993V)
[0.95V] [1.07V] [0.96V]
Tronic 900 mAh 1.2V - 2 pieces
(0.984V) (1.281V)
[0.95V] [1.23V]

Battery
(1.772V)
[1.63V]