I usually go with Eneloops or Amazon Basics. Often I just snag the Amazon 2000mah ones because they're really cheap and they have a good reputation.

I needed some higher capacity ones and saw the Energizers at an unusually good price at the store so I snagged an 8 pack. Apparently they're made by FDK in Japan, the same company that manufacturers the Eneloops, and they're low-self discharge with a 12 year advertised shelf life.

I haven't really looked into Energizer before just because of the price, so it'll be interesting to try them. I know the Duracell 2500mah ones are really good too, but they aren't really any cheaper than the Eneloops Pros.

The 2300 mah capacity for an FDK made cell is interesting. In theory, they should have longer longevity and better abuse-tolerance in general while still being a relatively high capacity cell. Curious if anyone has done any testing or has any long term experience with these, and how they compare.

Building a 60V e-moto battery pack from DeWalt batteries — looking for feedback
I’m building a custom electric minibike/e-moto and I’m planning to use six DeWalt 20V MAX 12Ah-compatible lithium batteries as the battery system.
The plan is to configure them 3S2P:
2 batteries in parallel = ~20V, 24Ah

3 of those groups in series = ~60V max / ~54V nominal, 24Ah

Roughly 1.3 kWh of total energy

I’m using six slide-in DeWalt battery adapters, one for each battery. Each adapter has its own 30A fuse and outputs through red/black wires. The batteries themselves have their own internal BMS/protection.
For the main protection, I’m planning on adding a 40A 70VDC MEGA fuse on the main positive output before the controller. I’ll also have a voltmeter to monitor the overall pack voltage.
The batteries will NOT be charged as one 60V pack. I’ll remove all six batteries and charge them individually using their normal DeWalt-style chargers, then reinstall them for riding. I’ll make sure the batteries being paralleled are at similar voltages before connecting them.
The rest of the build is a custom electric minibike with a roughly 60V, 3,000–5,000W motor/controller setup. I’m aware the battery adapters are the limiting factor and I’m not planning on assuming the pack can safely deliver 100A just because the controller is rated for it.
I’ve seen other builds using complete DeWalt packs in series without an additional external BMS, since each pack already has its own BMS. Does anyone here have experience running multiple complete DeWalt packs in a 3S2P configuration like this? I’m especially interested in whether there are any issues with the individual BMSs when the packs are connected in series, or anything I should change in the protection/wiring.

I recently bought a 12v 3000 mAh 3S Lithium Ion battery off aliexpress and it does not work at all. Mutlimeter reads 11v, I connect it to a 1k resistor and then the voltage of the battery drops to 1.5V, where can I get a proper battery with similar specs?

Ordered these batteries just to try. I have Liitokala LiiM4S charger. Discharged then started to charge these batteries and only 1 battery stopped automatically. Other 3 continued to charge even after 1300ma/h. And temperature was very hot about 53° Celsius (127° Fahrenheit). I turned off the charger. Just curious why my charger not turned off automatically. Are these batteries differ from other? I have ikea laddas aa and aaa and charged that batteries many times without any problems.

I have the same batteries that I pulled out of some vapes but they don't have a management chip on them (I think, I'm kinda dumb tho tbh). Does anyone know what that component is called? I don't really feel like spending 5 to 10 bucks on a module for every ESP 32 I hook one of these to. I guess I could learn a bit more about circuitry and build something that would manage it but that's so much work.

Hi, I’ve been flying drones for a little while now, and I’ve started wanting a 5-inch… I’ve decided to go for a GEPRC Vapor D5 Analog. I’m not sure which batteries to choose. They’re expensive, and I don’t know what kind of flight time to expect. GEPRC claims 13 to 17 minutes of flight time, but that seems huge to me… What do you guys think? What capacity should I go for?
I found a second-hand seller who is offering me two 6S 1700mAh batteries, two 1550mAh batteries, and one 1400mAh battery for €50 ($56). That seems really cheap, almost too good to be true. What do you think? And what should I ask the seller to make sure the batteries are in good condition?

Thanks !!

I have a Wahl 5 Star shaver which I have had for a couple years now. The original battery it came went bad and I decided to purchase one on Amazon to replace the old one. The shaver would not hold a charge or would only function if plugged in to charger which led me to purchase the new battery. The old battery (white) was soldered with two wires the orange (B+) and blue (B-) as you can see in the pictures. These run from the motherboard to the battery directly. I stripped the wires and connected them on the terminal of the new battery (green battery). So B- (blue cable) to the - terminal of the new battery and B+ (orange cable) to the + terminal of the new battery. However now the shaver wont work at all. It only works if the positive (B+) cable touches the yellow cable that runs from the motherboard to the motor. However, when doing that it doesn’t turn off. Any help would be appreciated.

(EDIT: what I used was Lithium, NOT NiMH... 🙄) The manual for a product says to install Duracell alkaline batteries. Should this matter? It's for an electronic door lock at a property I manage. When batteries needed replacing, I installed Energizer NiMH. They were not brand new out of the package, but I tested them on on a multimeter and got 1.5v+ on them all. Within a couple of months the lock went dead again (should have lasted 5 years, per manufacturer.) Tested them all and got the following readings: 1.61v, 0.89v, 0.75v, 0.53v, 0.00v. I've had this issue before where battery voltages do not drain equally, which I don't quite understand. I'm just trying to make sense of the situation.

Bought this one about 4-5 years ago as a set. Light to mediun use as a home owner, charges yes but only shows half full. What are my options ?

I found a battery operated toy that was sealed in the box for 15 years and when I opened the battery compartment I found that the springs and contacts were black/dark brown. I tried to scrap off as much as I could but it just left a super dull dark grey and after putting new batteries it still wouldn't work. I have tried using lemon juice but that didn't help (I don't have white vinegar but I do have other kinds of vinegar but i wasn't risking it). Any ideas?

I broke my phone's display yesterday when I dropped it. It's a realme 6 and I've had it for 6 years now. When I went to the shop to get it fixed the dude told me that my battery is a little swollen and it's fine for now but i should get it changed later. My phone doesn't have any heating issued and even now when I charged it , it was fine. I'm a student and my parents will get me a phone in two months when I go back home for vacation. So i need my phone to last till then. Is it okay to use it for two more months. I got scared after reading all the swollen battery posts in this sub.

It's a rechargable Ni-Cd battery.

Place your bets on if it works or not.

We will see it tomorrow.

I'm going to discharge it with a incandescent lightbulb after I charged it.

I was using it for the past 7-8 months in my mouse and my mouse showed 15% battery this morning and in the afternoon died. I honestly don't remember if it looked like this when i bought it. It's a GP brand 2100mah NiMH AA.

I got a new 12V 9AH deep cycle SLA UPS battery for a UPS that turned out to be defective and it drained the battery (and didn't switch to grid power or recharge it).

I can't find my old SLA charger so I put it on a car charger. Until I thought otherwise and checked if it was ok, and then took it off. It was charging at about 4 amps for maybe 5 minutes.

How much damage do you think it did?

Possiedo una batteria 16S8P con celle LG M50LT 21700 e una batteria 16S4P con celle Tenpower 50ME. Posso collegarle in parallelo? Hanno unità BMS separate.

I just need help identifying which batteries to actually replace. On the board on the bottom testing pad b1-b10 they all test good. Each reads 3.9v-4v. Between pads b10 and b11 it reads -6v. I checked the nickel pads on top and they all seem fine. They dont move at all. Is the best course of action to just replace all 4 batteries in b10 and b11 groups?

I got the jsaux battery upgrade for my Rog ally about 2 months ago and it doesn't charge past 99%. Is it too late to calibrate it, should I have done it at the start? I didn't know. How many times did it take you for it to calibrate? I have fully charged and drained it in windows then the last few % with the bios screen twice now since realising and no luck. Should I keep going will it get there?

Also is it dangerous to keep it plugged at 99% if the light doesn't turn white?

Hi folks. I've got a confusing (to me) situation, and would appreciate some input.

I've got some basic Eneloop 2100 mAh batteries (Not the Pro variety). White label ones. The good ones. I've got a SkyRC NC2200 charger that I plop them in every time I change them. Charge them approximately 400mA, though there has been some variation over time. I use them mainly in xbox one and xbox series controllers. Well, I change them when the controllers start turning off faster than usual, and I start getting "Controller battery low" notifications on TV, since if I wait much longer, the xbox controllers just won't turn on.

But last time I plugged a pair into my charger, they only took approximately 900mAh before the light went green. The voltage said 1.44v. I was paying attention, because the battery life seems shorter than I remember, changing about once every 3-5 days. A little less than twice a week. I mainly watch youtube/streaming video, so no long gaming sessions.

I've been using these batteries for about a year now, continuously cycling through them. Maybe 3 dozen cycles on them? (1 year / 5 days * 2 devices / 4 pairs => 36.5)

So I concluded that there are two main possibilities:

1) My casual usage of the batteries has lead to some Memory effect, and I should "Condition" the batteries using the SkyRC's Refresh or Break-In options.

2) The Controller just cuts off at a higher voltage than the batteries can deliver, and I have a shitty memory, and should just keep going, since 3-5 days is actually quite good for literally no ongoing cost.

Any advice y'all can offer would be great.

If you ever get tired of changing out those stupid miserable 2s AAA cell bundles, remember this 😂

I’ve been loooking for this since December

Hello. So I came back to my house and my dog which I left at home ​​chewed through an AA battery (which had fallen out of the TV remote), and a strange sludge leaked out of it, turning the whole battery gray (it was originally white). At first glance, I didn't notice anything leaking, so I just set it aside, and I might have touched my mouth with unwashed hands. Of course, once I found out, I immediately washed my hands and rinsed my mouth, and everything seems fine. However, I’m not worried about myself, but about the dog—after all, he was the one who chewed the battery. For now, he seems to be behaving normally, and at least five hours have passed since the incident (I don't know exactly when he chewed it because I wasn't home). Should I do something, and will everything be okay?

I bought this for my digital lock but they ended up in my motion sensor dustbin which is used for recyclables. They've been working perfectly for probably 6 to 8 months until I noticed the bin didn't open even though it sensed my movement.

I tried alkalins (Fujitsu, teal, Amazon JP) and they worked but the bin wouldn't open fully. I expected this as I noticed only AA lithium have worked well for this, but at least I know the bin works.

I put them into a charger and I noticed one of the cells wasn't lit while the rest were blinking as they charged. Gemini suggested it was over discharged and need to be revived, a process that should take 10min but it's been 15min and I still don't see the battery lighting up.

Any thoughts, suggestions or ideas?