Charging liIon batteries

[Beamin]

When charging liIon batteries does each charging chip need to be specific to the mAh of the cell? Or does the chip have a pin where you connect a resistor/cap to specify the mAh? Or does it not matter and the chip detects or doesn;t matter?

I would like to convert some older nicd/nimh devices to liion. Surprised china hasnt made dangerous AA/AAA form factor liion's. They already make hot water baby cookers ,electrocution shower heads and radioactive blankets bracelets dildo's.

[ledtester]

Typical Li-ion charging chips have a programmable charge current (not capacity) which you set via a resistor.

E.g. google for "TP4056 datasheet".

[NiHaoMike]

You have to set the charging current to be within the limit for the cell, consider the limit 1C if you don't know and ideally 0.5C or lower. Particularly large cells (more than 20Ah or so) are likely to be lower due to less surface area per volume for heat dissipation. As for the charging stop voltage, 4.2V/cell is the most common but if you can find a charger that stops at 4.1V/cell, you'll dramatically increase the service life of the pack.

Surprised china hasnt made dangerous AA/AAA form factor liion's.

I think the "AAs" are better known as 14500s or something like that.

[Beamin]

You have to set the charging current to be within the limit for the cell, consider the limit 1C if you don't know and ideally 0.5C or lower. Particularly large cells (more than 20Ah or so) are likely to be lower due to less surface area per volume for heat dissipation. As for the charging stop voltage, 4.2V/cell is the most common but if you can find a charger that stops at 4.1V/cell, you'll dramatically increase the service life of the pack.

Surprised china hasnt made dangerous AA/AAA form factor liion's.

I think the "AAs" are better known as 14500s or something like that.

They do have AA liions?

DOH  I just found a really old  eevblog video on liion batteries. Dont know how I missed it out of the 1000+ videos.

[BravoV]

When charging liIon batteries does each charging chip need to be specific to the mAh of the cell? Or does the chip have a pin where you connect a resistor/cap to specify the mAh? Or does it not matter and the chip detects or doesn;t matter?

I would like to convert some older nicd/nimh devices to liion. Surprised china hasnt made dangerous AA/AAA form factor liion's. They already make hot water baby cookers ,electrocution shower heads and radioactive blankets bracelets dildo's.

Below are my 14500 Li-ion cells compared to NiMh, red ones made by Japanese Sanyo/Panasonic UR14500P 840mAh.

Not sure why China gets into these narrative. 
Does this change your attitude against Japanese ? ... just plain stupidity ...