Involvement:Novice (still getting used to it) - Ownership:1 day to 1 week
Received this charger a few days ago. Works great, voltage cut off for both channels measured to be 4.2v exactly. Batteries are not hot to touch at all time. LED changes from red (charging) to green (charging finish) and bright.
Leaving the Li-ion in the charger after it turns green will increase the voltage to about 4.24v. Might be a bit scary.
LED however, will glows green even when there's no battery in the charger. Hence, there's a likelihood that a poor contact might cause an 18650 not to be charge when the user would think that the batt is fully charged.
Overall, cheap and great charger. While there're cons, but considering the price paid, the cons does not seems so crucial. And this charger charged an 18650 faster than my Li-ion (1A) for camera battery improved to charge 18650 by 1 time.
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