LiMn or Li-ion?

Just received a pair of BestInOne IMR18650 1500mAh. I've read lots of positive reviews on here and I'm hoping they wil deliver more amps to the LEDs in my Romisen T601 II U2 and Manafont UF P60 XML 3-mode respectively.

The description on the page in the link above says IMR18650-1500mAh 3.7V Rechargeable LiMn battery (2 pcs)

but the sticker on the cell say Li-ion (see pic).

I'm a little confused. LiMn is not the same as Li-ion, is it?

Can anybody explain this to a cell noob? All help is much appreciated.

BestInOne IMR 18650 1500mAh

LiIon covers many different types of battery chemistry.

The most common is ICR or LiCoO2 that is used for the usual protected batteries.

Then there are the IMR or LiMn that is often used for high current batteries.

You can also get IFR or LiFePO4 that has a lower voltage (Nominal voltage is 3.3 volt).

If you check Wikipedia you will see more LiIon types.

Many thanks for the explanation HKJ, I'm much clearer on the subject now. The Wikipedia info is quite extensive and not for the faint-hearted, unless you've a Ph.D in chemistry and then it's a breeze.

So my question "LiMn or Li-ion?" is a bit like "Salmon or Fish?".

Exactly, you got it.

Hi. No disrespect meant for the OP but I am also curious about these IMR batteries. I mainly use the LiCo batteries for my lights but am considering using LiMn batteries for relatively short runtime applications requiring high current. My questions are:

1. How consistent are the quality of the BestInOne IMR 1500maH 18650s?

2. What is the maximum current that can be had from these batteries without significant sag in battery voltage? Are they capable of 5~6A?

3. Do these batteries have significant sag in voltage at load currents of 5-6 Amps? Specifically, what voltage can be expected with 5~6A load current?

I am wanting to power a single 18650 light with 3*XR-E R2s individually driven on high at 1.4~1.75A for 3-5 minute bursts but am concerned that the voltage of these batteries may fall below the 3.78~3.85V Vf required by the LEDs. I would really appreciate any feedback on these before I place an order. Thanks in advance.

I have not tested the BestInOne IMR cells.

The IMR I have tested can easily handle 5 to 6 ampere, I tested up to 20A.

All batteries does have sag, at higher currents IMR are some of the best, but 3.8 volt is to high.

They can hold 3.6 volt for a short time, see my battery test summary, 3.6 volt bar graph.

Both cells measured 3.9v out of the packet so I charged them for about 2 1/2 hours at which point they measured 4.15v. I'm sure if I'd left them longer they would have reached 4.2v, but I was impatient to try them out.

I put one in a Romisen T601 II U2 and measured 3.85A dropping to around a steady 3.5A after 30 seconds and onwards.

This compares very well with a freshly charged TF Flame which gives 2.5A with the same torch under similar conditions.

Right now I'm very pleased - only time will tell if the cells have consistency and a reasonable lifespan. The price is good compared to other IMRs.

Mitro did some testing of a lot of different batteries including 18650 IMR's from BestInOne (though they didn't have a label back then). Results are posted in this thread:

https://budgetlightforum.com/t/-/2325

Thanks for the info guys. I really appreciate it.

They are both lithium ion batteries

one is lithium cobalt and the other is lithium manganese

But the real answer is they are both lithium ion

confusion comes from people saying lithium ion is dangerous and needs a protection curcuit added and lmr or imr is safer and doesn't need a protection curcuit .

down side is the capacities are smaller so runtime on these batteries are shorter ..

Noticably shorter ..

These both are lithium batteries
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