How to recharge or re energize regular alkaline batteries safely and effectively

In this video I will be showing you how I 'recharge' or re-energize my alkaline batteries.

[nonshatter]

I recall having a charger, perhaps 20+ years ago that could 'refresh-charge' alkaline batteries and it would really work. As the host says, it would not be to the capacity of a new battery but it would be enough for use over an appreciable period.

I've just had a look and I still have it. It is the Goodmans Intelligent battery charger GBC1100. It has a switch dedicated to alkaline batteries. It really saved me a lot on battery costs.

[jeffduce]

I recharged my non rechargeable Alkaline AA Batteries like 100 times by now. I got a cheap USB powered charger from ebay and i recharge them for 30 min on/ 30 min off / 30 min on / 30 min off for 4 hours

[z.s.]

even before watching the video, I felt aha I must watch this guy, he seems expert and know about battery :)

[fvrrljr]

photovoltaic / solar thermal technician here. from thumbnail picture i thought you were trolling but you weren't. very nice 👍

[examplerkey]

I bought a ton of used 18650 for really cheap from a computer repair shop that regularly throws away faulty laptop batteries. I modified every clock or device to take it. Now that's how I solved the problem. The kitchen timer that I use everyday is still working after one and a half year from a single 18650. 😂

[asleepawake]

There used to be a product called battizer, it claimed to charge alkaline batteries using small pulse charging, not continuous trickle charge.

[crazysquirrel]

Radio Shack used to sell a recharger for Alkaline batteries including 9V ones.
Could do 2 batteries or one 9V.
D cell batteries took nearly 18-20 hours to charge.
Too bad they are out of business and no longer have those available.

[sailingcapedissappointment]

Ya I put 17 volts into some Duracells and they barely got warm but it only took to the count of ten and they were reading four and a half volts. I even charged some wafer batteries and they are still holding 7 volts but they are supposed to be three volts so I thought maybe I shouldn't put so much voltage into them so I set up some more resistors on the transformer I was using and got it down to 9 volts and now I can let them charge slower and longer. None of them really got hot but I wasn't charging them very long either but I'm sure they will explode if left long enough. The fast charge is kind of cool though and the couple extra volts really makes for an extra bright LED flashlight so I thought I might try cooling things down a bit and I put some batteries (dead batteries) in the freezer thinking I can keep from damaging them that way and I froze them up good. What a surprise that was because I read four volts off of the dead AAs that I froze and I hadn't even charged them yet, that goes for wafer batteries too. I could have swore they where dead when I put them in the freezer? Needless to say none of the batteries I froze ever got warm the whole time I was charging them and I was hitting them with nine volts, I know there are some more resistors around here somewhere and I imagine I will get the performance up to what it should be and I have a whole bucket of batteries to work with. Also it is interesting to note that I only found one leaking duracell out of that whole bucket ....
Update:
I found another AA battery that reads Zero, I put it in the freezer and it came out reading 3 volts .. I'm charging it at fifteen minute intervals in and out of the freezer ..

Update: I as reading 15 volts off this power supply and now I have three power supply's to work with so I set one f them up with a potentiometer so I can just the voltage level so I can trickle charge at around 1.5 volts and the Dura Cells are doing very well this way, I also set up a trim pot so I can adjust t very minute increments and charged a 18650 3.7V Lipo nd it was easy to set the voltage just a volt over what the battery was reading and watch the VU meter while it charged so I have two seperate readings for what is going in to the battery and what the battery is reading ....

[lanellmitchell]

I recharge my AA and AAA Eneloop batteries with a charger I purchased from Amazon.. I'd like to recharge A23 12v alkaline batteries that we use for remote controls/ceiling fan, but they don't fit in the recharger because the batteries are approximately 1/2 the length of a A/AA battery. Do you have any suggestions? The A23 batteries cost about $5ea and we use 2 per year per room.

[jeffduce]

Thanks a lot for this video! Keep up the good work :)

[jot]

This guy has more tools than builders warehouse

[exoplanet]

Thanks for a valuable video. A few questions:  

1. at 3:15 you label the type of charger you use as "alkaline rechargeable device". It would be useful to distinguish these from other kinds of chargers. One of my chargers immediately rejects my alkaline non-rechargeable batteries, while another (less high tech) charger accepts them.
2. I am assuming you use a 4 hour timer to avoid the possibility that unlimited charging time might cause battery damage. Is that right? If so how did you settle on 4 hours?
3. Have you tried recharging batteries that are very drained vs. those that are less drained. For example I have quite a few AA alkaline that are giving 1.0 V now. Would you expect they could be recharged just a well as more depleted batteries (eg 0.5 V)?

[lights]

How do they charge new batteries at the factory? I just bought 8 D cell batteries and put them in a 9 inch plastic fan, and the fan would not turn on. I put the old ones in and it ran. I put 6 other new batteries in and it worked fine. I put the first set of new ones back in and - again nothing. I think that sometimes they ship dead batteries. I'm going to test them in the store before I buy them from now on.

[mrheart]

How many days if used this in multi tester same as you?

[paveljelinek]

6:46 😂 maan current on the series connection is always the same

[davidpalmer]

why don't you use a good regulated DC power supply. I have one, that displays V, A, W. Current and Voltage have Coarse and fine adjustment. I used it to charge my Lithium Ion Motorcycle battery. you have to watch the current draw, dont leave unattended.

[svitlanabal]

Is this possible to recharge duracell® 6v lantern alkaline battery? If yes, how to do this.

[jmous]

Can you write your items that we need for doing this process. I would like to order this on amazon. Thank you

[nutzeeer]

I use the C1303 charger to recharge my alkalines. It has an alkaline charging mode.

[JohnUsp]

300mA is very high, try to reduce to 15mA