FlePow charger can charge one or two 18650 batteries at a time. It also works for 18500, 14500, 14430, 10440, 16340, 22650 batteries. I use 18650 in several motion sensitive lights as well as flashlights. Some of them run on a single 18650 battery, so the fact that can handle recharging single batteries as well as two at a time is very useful for me. Foxnova capacity tester showed capacity of these batteries to be 2827 mAh at 3.89V.
FlePow charger is 5.125"L x 2.25"W x 1"H. The AC cord is 40". The charger becomes only slightly warm during charging (normal), while the batteries themselves remain totally cool. The charger has a bright charging status indicator. Green LED light indicates full charge, and red LED light indicates charging is in progress. This charger does not have a discharge option that is available on some chargers.
Geeky sidebar: A few times in the past I have been asked about the internal resistance of the batteries I reviewed. I recently put together instrumentation that allows me to calculate internal resistance. I tested this battery under load of 6.6Ω(Ohm) and calculated the internal resistance by dividing the voltage drop (0.16V) by the current through the load (0.608A). The internal resistance is 0.263Ω.
The description states that the batteries achieve their full charge capacity after 4-5 recharge cycles. I used a different charger to do 4 extra discharge cycles and so far the batteries hold the charge very well. The light has been on using one of these batteries for several week without any signs of dimming. These batteries appear to be just a little larger (1 mm or so) than my original batteries that came in my light. The batteries do fit, but they are harder to put in, I need more force to push them in.
Overall, I like the charger and despite the tight fit the batteries work well.
You can find it on Amazon by following this link.
Ali Julia review ★★★★☆
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