Mostly I see a figure of 63% full, so when I stuck a meter on to check battery use, I also looked at the charging rate.
My device charges at a low 0.5Amp, which isnt really the problem even though the charger says 1.5A rating.
The problem is that it switches off after 1hr 30min which is definitely not long enough to fully charge the batt, ideally 3hrs plus is what is needed.
After the 1st charge from dead flat, which took 1hr 30min, the batt was only reading 8.2V on the meter, the next charge was finished much quicker in about 30min, by then it was time for bed and work in the morning. retests some other time.
Since testing the charging rates,I can no longer recommend the above method of 3x due to the fact that after a week of doing this the battery now reads 8.53V after the 2nd charge is finished.
This practice can only damage the battery or reduce its lifespan in the long term.
The big caution here is that Li-on batteries have very exact charging needs and the battery can be damaged by using the wrong charger/ charge rate.
e.g. I have a charger for a 7.4V 1100mah Li-on and I wouldnt even think of charging a 8.4v batt with it.
In other words dont use a 12V lead acid charger meant for a car battery.
Anyone else with any ideas or observations?
Last edited by blujeenz on Mon 29 Nov 2010 - 11:51; edited 1 time in total (Reason for editing : new tests and new info)