50 of 53 people found the following review helpful
First one failed,
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This review is from: Titanium Smart Fast 16 Bay Ni-MH AA/AAA Battery Charger AC 100-240V + DC Adapters MD-1600L (Electronics)
I really like the design and defaults of this charger. Unfortunately upon first use it heated up, began to smell like burnt wiring then malfunctioned and became inoperable. On the plus side it seems to have shut itself down before creating a fire. I like the design well enough that I will give it another try (which I usually would not since I hate the hassle of returning stuff by mail)If the next one holds up I will consider it a fluke and report back here
*** Update 5/17/12: As promised I am back with a review of replacement unit but first more info on the original problem. When I recived the first unit mentioned above I filled it with 8 aa's and 8 aaa's, after filling each 4 battery section I pressed the green button for that section to discharge batteries before charge. display indicated correctly the function for each bay, I did notice after a couple hours there was a hot spot toward one end of the charger. Do not mistake this for the normal warmth that is felt during operation, it was much hotter then the rest of the charger in one small area, hot enough to concern me but I waited to see what would happen. Eventually the charger shut itself down and the display was flashing in an abnormal way. I'm glad it malfunctioned and quit as I would have been unhappy using it the way it had heated up. I returned it and ordered another and Amazon took care of it in their usual no hassle way.
*** On to the new unit: I recieved a replacement unit and immediately repeated the same steps and loaded the same batteries as the first time. I am pleased to report that the first cycle has completed without any problem. No hotspots or other issues. There is of course the fairly evenly distributed warmth that can be felt on the bottom side of unit during operation which is normal and no where near the temp of the hot spot I described earlier. Have to say I like this charger alot, not only the large capacity, which is great, but also the simplicity and the charging/discharging currents chosen in the design are easy on the batteries (for longer life) but not too slow. Overall a great unit, so as promised I will judge my problem with the first unit to be an anomaly and adjust my rating accordingly, I am only subtracting a star because I had to return the first one. If Amazon makes this an "Amazon prime" item as it was when I bought it I will buy another!
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Showing 1-3 of 3 posts in this discussion
Initial post: Sep 29, 2013, 5:43:34 AM PDT
Mikhail Tagallie says:
you should only use the same type of batteries within each bank of 4. if u have a odd one have it in its own bank.
In reply to an earlier post on Nov 16, 2013, 6:52:48 PM PST
I was about to order this then I saw your comment. The description of the product implies that you can mix and match any number of AAs and AAAs regardless of banks or charge levels, Even thought It is a bit vague about the banks. Do you know the limitation with this charger as a matter of fact or you are speculating based on other chargers.
Thanks for your input.
Posted on Dec 26, 2013, 7:20:00 PM PST
I have not read / analyze this charger down at the schematic diagram level leaving this to a general comment.
The charger in a discharge mode dissipate energy more than charge mode. It may be excessively warm discharging batteries of 70 to 100% full. It will get even warmer when all 12 bays are occupied with such batteries. Heated by 19.2W for 1A discharge or up to 22.4W with freshly charged cells. Any plastic packaged electronics dissipating 19 to 22W not forced air cooled or equipped with heat distribution will develop hot spot without a doubt.
Therefore hot or warm is really depends on the discharge time length. I doubt the design engineer intended this charger to handle discharge abuse, discharging batteries with 70 to 100% full all 16 bays. Usually charge remains is accounted near the last 15% capacity when some of the series connected batteries has discharged down to below 1.0V.
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