Maha MH-C9000 SUPPORT / FAQ - continuation

[spotlight76]

Is there a way to remove this from my MH-C9000?

https://ibb.co/bFB0Zmf

 

[GAReed]

What is that?

 

[kreisl]

first, let's disassemble the charger.
second, try

warm water\soapy water
oil
alcohol
acetone
vinegar
citric acide
dish washing machine's detergent powder with warm water

as solvent. if all fails, try Bar Keepers Friend as last ressort. it can dissolve all metals. hehe

 

[spotlight76]

I think it's from an AAA battery.

 

[GAReed]

Last time I saw something like that it was a NiCad, those 'hair' like strands. Vinegar first
then uses baking soda/409 to clean off the 'salts'.

 

[spotlight76]

Is it safe to charge a battery in this slot even if it not completely cleaned?

 

[sbj]

Insert the battery to be charged, then apply pressure to the negative contact with one hand so that the battery is pressed against the positive contact. Then turn (twist) the battery back and forth with the other hand. This will rub off any oxide layer at the contacts that may be present. - That should work at least temporarily.
In the worst case, the charger cancels the charging process prematurely. Much worse cannot happen (in my opinion).

 

[spotlight76]

I read that rechargable batteries don't leak. It looks like this isn't true, at least in my case.

 

[GAReed]

what chemistry?

 

[spotlight76]

Ni-MH, what else?

 

[GAReed]

Well, I've had Ni-Cd leak but not one Ni-MH in 10+ years.

 

[spotlight76]

Should i remove the battery as soon as it is charged? If i leave it in the charger after being charged (or about 1 hour) can this reduce the life cycle?

 

[TinderBox (UK)]

Should i remove the battery as soon as it is charged? If i leave it in the charger after being charged (or about 1 hour) can this reduce the life cycle?

Supposedly the trickle charge after the main charge ends is only 10ma so it should not cause any problems.

 

[WalkIntoTheLight]

AA Cycler did a trickle-charge test, to see what the long-term effects were. IIRC, it was pretty minimal, until you got up to around 100mA.

 

[spotlight76]

In order to see the real capacity, the best option is discharge and/or refresh-analyze?

 

[spotlight76]

I discharged an AAA battery , and when i charged it the capacity shown was about 90mAh less than the capacity shown when discharged. Why could this happen?