MaximalPower Universal Ultra Smart Charger FC997 for Alkaline NiMh NiCd Li-ion AA AAA C D Battery Cells Charger (Battery Charger only)

This is really a nice charger, and extremely versatile unlike any other. Well, except for 1 brand that got recalled. nitecore makes a high quality charger but they excluded D batteries for some inexplicable reason! (Cs are ok, wtf?)This one works great with whatever I throw into it and it autodetects and charges pretty quickly, without overheating the battery. I have tested Alkaline: AA,AAA,C,D, NiCad Cs, NiMH AAA,AA,C,D, and Lithium Ion 18650 and 16350 (with a spacer).The only issue is that it does not handle flat-top batteries well, so adding a small neodyme magnet to the top of the battery is necessary (or the use of some other spacer).I really like the spring mechanism...it is strong but it does not bend the metal when you pull it back or resist because you are putting torque on the mechanism. It feels high quality.Time will tell if it lasts but so far it is excellent.

Bought it for my firehouse to recharge remote batteries for the TV and cable. 3 of the 4 slots work to recharge which is fine by me, I'm not a perfectionist. The recharged battery does not last as long as when initially purchased but better than a dead battery. Also re-charges some vape batteries.

It's a good charger. I have some reservation on the unit. It charges some batteries better then others. It will charge the ray o vac batteries to a full 1.5 volts were as the Energizer only charge up to 1.3 volts. Now these are D cells. I even let them charge overnight and the results are the same.

Update: Beware: Duracell with Duralocks tend to leak after charging. I have old Duracell's without the Duralock and haven't had any of those leak yet.We have Mr Beams battery operated sensor lights placed around the yard and gardens. Each take three D size batteries. While the batteries do last a long time, it gets pricey - even at Costco prices - when it comes time to replace them. First time I had to cycle them, I realized the dead battery body count was going to be astronomical over time.I'm a product of the 60s and remember alkaline "chargers" of the 70s and 80s. Between the quality of the batteries and the lack of technology, those were not only ineffective - they were downright dangerous. Had many explode and leak like mad.We switched to rechargeable batteries and had some winners and losers. They were cheap enough for AA or AAA sizes, but D rechargeable batteries? Wow. And reading reviews I saw those don't always last or perform like they should, so I began to think about recharging alkaline batteries once more.I was very skeptical and did hours/days of research. The cheap alkaline chargers are almost guaranteed to disappoint, but there are some expensive ones that perform no better. I asked around a few forums and was pointed toward the FC999, came here to buy it, but then I saw this one. I asked the manufacturer if it was the newer one and what the difference was between the two and received a prompt response! Yes - this is newer, and it can charge some lithium batteries that the FC999 does not. So I clicked "I'll bite".When I received my charger (from MaximalPower - received it SOONER than expected), I went out and cycled old batteries (Duracells) for new, brought them in and set up my charging station. I tested the first set and found 1 still pretty good (but could use a boost) and 2 others that were well-drained. After warming them to room temp, I popped them in. Within a half hour, the 1st was done. Thinking "oh, sure it's done" quite sarcastically, I took it out and tested it. What do you know. It IS good. Using the tester, I can't tell the difference. I'm no electronic wizard, just a battery user looking to make my alkalines last longer, so I'm relying on my hand-held battery tester available at any hardware store. Nonetheless, I am very impressed...so far.I'm a picky shopper, so you can bet I will return to update if problems arise, but right now I'm loving this thing! FINALLY someone got these things right!!

I had one of these units and in under a month, 2 of the lanes wouldn't charge anymore. When batteries were inserted, the charge indicator never activated to show it was being charged. The same batteries put into different lanes would show they were charging. So, I swapped it out for a 2nd unit with Amazon. In under 5 recharges, the far left lane did the same thing! Putting a battery in it shows no battery is inserted, even though it had been working on arrival. Putting the same batteries in any other lane shows they are charging.So, the bottom line is the FC997 is nothing but junk. I had an FC999 Mark III that lasted much longer. So, I recommend that instead. Actually, I would have gotten it instead of the FC997, but the 999 was no longer showing as available. It is now now so get the 999 over the 997.

I have no problems, it seems to work just fine

One of the banks keeps trying to not work and I have to readjust the battery often to keep it charging. D batteries take forever to charge (like 24 hours?), aaa batteries charge in less than an hour but only last about 30 minutes - maybe it's cause they're alkalines and not re-chargeables? I don't know. But I want another one of these.

I didn't have any dislike so far...I use it mainly for AA and AAA batteries for my daughter's toy trains and other toys. So far this charger seems to super charge batteries to work longer in the toys.

I am having great success with multiple cycles of my AA and AAA cells. I have two new Tenergy low self discharge 9V 200mA batteries and one charges and then eventually the screen goes blank and never says "OK", like normal. The other 9V battery gives a blank screen immediately and never charges; no BAD, no OK message. I put a 9V zinc carbon 9V battery in and it gave better start and finish ending on OK messages and it is not chargeable. I suspect the slow, low current, low self discharge is making the one Tenergy look like a disconnection and never gets started charging. I also put this faulty looking Tenergy in a 30 year old NiCd charger for just 45 minutes, just to see if it would take a charge and yes, now I see the voltage up from 4.5V to 9.44V and it is functionally charged. So I would conclude the Tenergy 9V rechargeable NiMH slow self discharge types are not for this charger.