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01-09-05, 05:29 PM

I have finshed the first round of tests. Voltage was a little closer to 5v then I originally planned but I don't think it would really be effecting the current. I would be attaching a JPG with the curve on it but the board is limiting me to a 100kb 450x450 image and the one my software produced while I can get it in under 100k I can't resize it and have you still be able to read it so I need to plot the data in excel later.

The axim was off so all current mesurements are done over time and not the % charge of the battery. Tests were done on the 2200mAh battery and I will redo them for the 1100mAh battery soon.

Samples were taken every second for 10,000 samples (about 2 hours 45 minutes) by which time the battery was fully charged.

For the first 6,000 samples the current was pretty constant at 925mA then has a pretty steep drop until it reaches 100mA at around the 9,600 second. At that point the current dropped from 100mA to 6mA which showed the battery was fully charged.

The interesting thing is though the fact that for most of the charging cycle it was at 925mA which mind you is almost twice the current that a USB port should be able to provide and thats assuming the axim is off.

Hope to have some info on the 1100mAh battery in the next few days and need to get the curve posted so you guys can take a look at it.

01-09-05, 05:29 PM	#18 (permalink)
Kenban Guest Posts: n/a	I have finshed the first round of tests. Voltage was a little closer to 5v then I originally planned but I don't think it would really be effecting the current. I would be attaching a JPG with the curve on it but the board is limiting me to a 100kb 450x450 image and the one my software produced while I can get it in under 100k I can't resize it and have you still be able to read it so I need to plot the data in excel later. The axim was off so all current mesurements are done over time and not the % charge of the battery. Tests were done on the 2200mAh battery and I will redo them for the 1100mAh battery soon. Samples were taken every second for 10,000 samples (about 2 hours 45 minutes) by which time the battery was fully charged. For the first 6,000 samples the current was pretty constant at 925mA then has a pretty steep drop until it reaches 100mA at around the 9,600 second. At that point the current dropped from 100mA to 6mA which showed the battery was fully charged. The interesting thing is though the fact that for most of the charging cycle it was at 925mA which mind you is almost twice the current that a USB port should be able to provide and thats assuming the axim is off. Hope to have some info on the 1100mAh battery in the next few days and need to get the curve posted so you guys can take a look at it.