Test/review of VBatty 32700 3.2V 7000mAh (Grey) - Page 2

Let me just bump this thread.

Xiaolu supply professional and honest service.

I want to buy 4 of these cells, but i would like to know who sells the best ones, or the best value for the price.
Many many AliExpress stores sell them, but even though they all have a gray wrapper, there are different specifications, prizes and even sizes (between and ).
Soooo…. Any advice is welcome.

(i want to use them in a MAGLITE 3D)

Hmmm… I’m still not sure, saw some discouraging reviews there, but these big cells are not popular here, so i’ll probably have to try my luck…

But if anyone else has a good suggestion for where to buy 4 of these, let us know.

And what is the value of a review written by someone who doesn't knows where his/her arse is? You know what this means, doesn't it?

The cells are good. Their consistency could be better, I know. But with LiFePO4 this is less important, at least with regards to battery pack assembly as I've already discovered the chemistry is self-balancing.

If you do care much about using them in series, buy twice or thrice the number of cells you need and, with the help of some battery capacity measuring device, sort/bin them low to high and make balanced packs. I recently bought this inexpensive EBD-M05 constant current capacity tester, discharges at up to 5A with 4-wire independent voltage monitoring and does discharge graphs. User HenrysCat has one, check:

• ZKE Tech EBD-M05 help
• Test GTF mAh
• Some fake 30Q discharge graphs here.

Since the consistency of those LiFePO4 cells is not the best at least one could drop a bit below 2 V. I see no reason for this to be a problem, though.

Mmm, just noticed I already pinpointed you to the EBD-M05 device.

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The grey VBatty LiFePo4 cells i use in a solar powered outdoor light are 2 years old now, time for a new capacitytest.
Now i have a much better capacity tester (Hidance DL24/P).
Two years ago i built a 2S battery pack with these cells to replace the original 12V 4Ah lead-acid battery that was dead after only one year.
These cells + the protection board were about the same price as a new 12V 4Ah lead-acid battery, but these LiFePo4 cells have a higher capacity (at least 50% more real capacity).

I tested the 2S battery pack at 2A with a 5,0V cutoff voltage, and these are the results:

mAh or 37,2Wh (=18,6Wh/cell) after 2 years of “outdoor temperatures” (cold in the winter, and 2 hot summers) is a very good result.
These cells will last many years, much longer than a lead-acid battery.

I will try to remember testing these cells every year, i hope they will last for many more years.
The next test will be at the end of .

I know it’s an older thread but it’s very useful… I’m quite interested in combining 4 of these in series for a project. Are these too big to fit into commercial hobby chargers that would be used for s ? I’d quite like to get a 4 cell holder if possible but will consider connecting them together permanently (solder?) and finding a suitable charger…

You wouldn’t want to use an charger for LFP cells since the voltage is different. There is another type of hobby charger with wire leads, that can often be configured for different voltages. But, you want to have some kind of cell balancing when charging. You really should know what you are doing before attempting something like a series battery pack (parallel is simpler). If you just want a 6 volt LFP pack, Bioenno is a popular brand among ham radio types. They aren’t the cheapest but they are well made. They have 6 volt packs in 3ah and 12ah and come with optional plug-in chargers:

The ones I’ve seen people using were 12 volt, which is more popular.

They do generally not fit into cradle chargers, but there are exceptions.
You can check my list here: https://lygte-info.dk/info/roundCellChargerIndex%20UK.html

A hobby charger can charge one cell or four in series with the correct wiring, but you will have to make your own connections/wiring.

If you are in doubt about what a hobby charger is, check here: https://lygte-info.dk/info/HobbyChargers%20UK.html

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EU warehouse means EU price gauging..

~5,80 when bought in quantity of 16, is that really that bad? I had this website bookmarked from an earlier search, because they had such a large catalog and I thought the prices for EU were reasonable. If they don't offer value for money I will remove them from my bookmarks.

In Alibaba this cell costs 1.65$

But is it actually that cell?

There can be various grades of cells, scrapped failed-QC-cells sold as new, and there can also be counterfeit cells (even up to junk recycled cells rewrapped as new of some other brand, endcaps to cover damage/old welds, etc).

it's difficult to be sure of any cell vendor unless they have already repeatedly provided verified & tested (by the end-user!) products, without any instances of "oops" (received product not matching manufacturer specs, etc).

Just because a cell is expensive doesn't make it good, and just because a cell is cheaper at one place vs another doesn't make it bad, but Ali* are both rife with cell and battery scammers. (as is the internet in general, ebay, amazon, temu, etc etc)


Just sayin, be careful out there. OK tested Hakadi LiFePO4 cells.
They should be 6Ah, but at best we measured about 80% capacity of advertised. Even that was at 0.2C
At 1C we got maybe 65% of nominal and the voltage sagged really soon.
So, not good cell, AVOID