more compelling evidence to avoid these chargers...
I wouldn't leave a li-ion cell on a charger for 2 days regardless. Scary thought what's going on behind the scenes there...
What's funny is this:
1. You can spend ~$50 on a decent charger and be pretty confident that it does the job correctly....
OR
2. You can spend $10 on a charger that may or may not work right, and the only way to find out if it's working right is to spend another $10 on a multi-meter, but then, since you only spent $10 on the multi-meter, you need to spend $50 on a multi-meter to check the accuracy of the $10 multi-meter, then you can test the charger, then you find out that the charger is using a charging algorithm that is not in compliance with any li-ion cell manufacture on the face of the planet and wind up spending the $50 on a decent charger anyways... $120 later you have the $50 charger....
The reality is that without a decent multi-meter and the charger in front of us, no-body here can really tell you what is going on.