Deleepow rechargeable AA lithium 1.5v batteries

[n3eg]

I got a pack of 4 with charger just for the heck of it. These are the direct recharge type with no micro USB. Put them in a Dremel 4AA tool and went to (ironically enough) cut a battery pack to salvage some 18650s. It dropped to slow speed. I took out the batteries and found one showing 0.26 v. It got warm and stayed warm for 4 hours, meaning something had shorted internally. Next day, it's at 0 v and not charging. Tried to charge it - no change. Junk.

Found out the charger is a 50% duty cycle 1 second on/off 4.7 v output charger which terminates.

Anyone else have any experience with these?

 

[aznsx]

Anyone else have any experience with these?

NO - nor will I - especially with a name like that.

I'm just glad it wasn't 'Delaypow' instead, and it didn't blow up in your face when you later tried to charge it!!

There's a bunch of similar products hitting the market of late and a fair amount of chatter about them, but I have to wonder...

Are the people using them keeping in mind that on the 'pros and cons' list, one of the cons is that one is taking on the additional risks associated with using a lithium ion power source vs other 'AA' format alternatives? No one seems to mention that factor. Glad you raised the issue, but glad that ended without injury / damage!

 

[chillinn]

video review LOL

18% of Amazon reviews are one star, some reporting similar to your experience.

Lithium ion AA cells should have a protection circuit that prevents them from both providing more than 1.5V, but also should have low voltage cutoff (which internally should not drop below 2.5V).

Here's a shootout of different brand liion AA cells tested.

 

[Galane]

That video is from 2 years ago. Been a bunch of changes in the 1.5V Li-Ion market since.

I got eight EBL red AA Li-Ion with two of their 4 cell chargers. I opened one of the chargers and there's a fair bit of electronics inside. Each cell has a white LED built in the positive end and the charger has a red/green LED for each cell.

Out of the 8, one would not charge and EBL replaced it. I had to buy two of their USB wall warts because none of the ones I had, even for my Samsung S20, would kick out the power. Search for EBL M5129 It's 2.1 amps, available for $8.95 on Amazon but for some reason not on the EBL official site since not long after I bought from there.

EBL has black 1.5v cells in the different sizes but naturally they're lower capacity due to the room taken by the USB port and additional electronics.

For $29.99 EBL has a set of 8 AA size Nickel-Zinc cells with a claimed 3000 mWh at 1.6 volts. Might be just the thing for devices that can tolerate 1.6 or 3.2 volts.

Definitely NOT suitable for something like a handheld CB radio that takes 10 AA cells, if they're 1.2V rechargeables and loading it with 10 alkalines fries it with 15 volts. I picked up exactly that years ago at a thrift shop and had it repaired. When I sold the radio I included a nice set of high mAh NiMH cells and glued a note inside the battery cover to use only 1.2V rechargables or replace two with dummies if using alkalines.

 

[n3eg]

I have used NiZn cells with good results. That was my first and last try with AA 1.5 volt cells. And I will not waste my time with YouTube videos - I want charts.

 

[alpg88]

I have several different brands, some are better than others, some put out 3A, for a little while, most 2A or lower, they are half the capacity of alkaline cells. I tried them first few years ago, threw them away pretty fast due to failures, they improved over time, modern ones seem to be better for now. even good ones do not compare to duracell optimum, those can push 4A when fresh.

 

[HakanC]

A few years ago CPF-member HKJ tested a few 1.5V LiION batteries

TenaVolts AA 2775mW
https://www.candlepowerforums.com/v...st-review-of-TenaVolts-AA-2775mW-(Black-blue)

Kentli AA PH5 3000mWh
https://www.candlepowerforums.com/v...8-Test-review-of-Kentli-AA-PH5-3000mWh-(Blue)

Kentli AAA PH7 1180mWh
https://www.candlepowerforums.com/v...-Test-review-of-Kentli-AAA-PH7-1180mWh-(Blue)

These, and others, are also in his comparator
https://lygte-info.dk/review/batteries2012/CommonAAcomparator.php

I have a few of the Kentli AA PH5 and I use them in a small portable radio, to keep the display visible, read more about it here
https://www.candlepowerforums.com/t...-aas-with-2800mwh-1850mah.465549/post-5371720