Test/review of Blackube AA 2250mWh USB (Black)

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HKJ
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sil wrote:
Hi, do you know how these battery would react over time if charged very often ?

I do not know how these batteries works, but generally for LiIon:

1) Frequent charge do not degrade the cells.
2) Time at 4 to 4.2 volt will degrade the cells, faster at higher voltage.

The second point is the issue, keeping it in the charger most of the time, means it will be at 4.2V most of the time (Most chargers will charge it to 4.2V when it is connected). This means the fastest wear rate (Depending on temperature). I do not know anything about how fast this wear rate is.
Most single chip chargers will charge a LiIon battery to 4.2V and then go into standby, each time the battery is connected.

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

sil
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Thanks for your answer HKJ,

So point 1 is not a problem.

Regarding point 2, if I understand correctly what you said, staying in charge a long time could be a problem unless the chip goes in standby, correct ?

Sil

HKJ
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sil wrote:

Regarding point 2, if I understand correctly what you said, staying in charge a long time could be a problem unless the chip goes in standby, correct ?

Correct. It can be checked with a voltmeter in parallel with the battery. The voltage will drop slightly (Some tents of mV) when the charger stops charging.

If you are in doubt about how to connect a meter while charging, see here (Charge voltage):
https://lygte-info.dk/info/Measurement%20UK.html

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

sil
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I also had in mind to check the voltage to confirm.
I’ll do it as you suggested.

Thanks a lot for these informations !
SB

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