On 9 Feb 2006 18:03:51 -0800, wrote:

i have recently purchased some li-ion batteries and connected them in
parallel and series to get a rating of approx22V and 4400mAH . i am not
understanding how to charge them ,,i have a dc adapter of rating 24v
and 1.25A ,can charging from this adapter be a solution to this
problem if yes then for how much time should i charge the battery pack

Assuming this is not a troll, charging of Li-Ion cells is a far more demanding
exercise than nickel-based or even lead-based cells. These cells present
substantial risks if not charged/discharged correctly.

The proper regime involves:

.. current-limited constant voltage charging.
.. monitoring of cell voltage differences in series strings.
.. provision for monitoring cell temperature to ensure it is within the "safe"
region.

In the recent past (it's probably been superseded several times over) I have
employed the Maxim MAX1737 controller chip in a commercial charger. It's worth
reading the data sheet on this device for much good information on the care and
feeding of these cells.

http://pdfserv.maxim-ic.com/en/ds/MAX1737.pdf

There are bound to be many more data sheets with similar valuable information.