The big Ebay refund day - finally got my Opus BT-C3100 v2.2 - fake, fake and fake. (batteries from Ebay)

[myhken]

@TheBo

I agree with Boaz, also I think this is how most of us landed here.

As a side note, did you considered that:
Capacity depends on many factor, but considering a perfect world with the EXACT PERFECT same battery, charged at the same voltage, mainly on the discharge cut off voltage. So if OPUS cut’s off at 3.00V and another one cuts off at 2.67V, you will get more mAh from the latter.

ALso drawn current affects capacity, as you all know. And also discharged capacity is more accurate than charged one.

Of course there will be difference. That because etc Sanyo uses a range from 2450 - 2600 on their UR18650ZY, depending of temperature in the room etc. So of my 50 UR18650ZY, I will guaranteed never see the same number twice.
But the actual discharge mAh should stay within the limits of 2450 - 2600 (aka 2699). And my Sanyo batteries are. The last two new i tested was around 2550+.

The Samsung test I did yesterday, had to be wrong, at least the two batteries I tested first. When I tested all four on charge discharge, I get 2884, 2886, 2874, 2850 after three full cycles. So thats within the margin.
I have sent a sorry mail to the seller, and closed the case.

On the seller that have sold me Ultrafire batteries…they can’t get away with it, so I have got some of my money back today, still waiting for one seller, and then there still is lots of Ultrafire batteries in the mail (ordered a long time ago) that will arrive, then tested, then I will open a case, if the batteries is not 3500mAh batteries then

One seller (two “stores”) wanted me to send the batteries back, 12 x 18650 5200mAh with a actual mAh at 1400-1500. I checked with the postal office, and I had to pay £28 if I wanted to send them to the UK from Norway as registered mail.
He did refund my money right away then. Since Ebay demands that the seller also pays the shipping back to them.

[snakebite]

unless you are running a test,name and shame sting operation its easy to avoid this garbage.the highest real capacity i have seen for 14500 is 840 and thats a sanyo.
3600 for 18650.
you know its B.S if stated higher and esp if “fire” is in the name!

[pro22000]

Here is a list over Ebay sellers that has sold me fake batteries: (updated 10.July 2015)
gothic_household – 8x UltraFire 18650 3.7v 5200mAh Li-ion
fastpostitem88 – 8x UltraFire 18650 3.7v 5200mAh Li-ion
rgbstore12 – 4x UltraFire 18650 3.7v 5200mAh Li-ion
amber.club – 2300mAh 14500 AA Size 3.7v Li-ion Rechargeable Battery
teamspeed2012 – UltraFire 2300mAh 14500 3.7v Li-ion Rechargeable Battery

I gues the description is almost correct:
gothic_household – 8x UltraFire 18650 3.7v 5200mAh Li-ion = 5200/8=650mAh per battery

[myhken]

I got two 26650 7800 red ultrafire batteries, ordered for a long time ago this week.
Actual mAh after charge - discharge - charge test on Opus BT-C3100 and LiitoKala Lii500 was 2200 and 2300 mAh.

This is from Ebay seller directsales-hk.

Also got some red AA (3000mAh) and AAA (1800mAh) from the same seller, they had an actual mAh of 300 and 200.

[poster]

@myhken

Actual mAh after charge - discharge - charge test on Opus BT-C3100 and LiitoKala Lii500 was 2200 and 2300 mAh.

i am the new owner of 2x lii-500 from Ali Express (~$24)

and would like to confer with other owners of the lii-500

how low does your lii-500 discharge before charging and to how high

i need more time with mine
i see 3.50v on the discharge
and 4.21v - 4.22v for the full charge

i started a mini review of the lii-500

BTW once i bought x…FIRE cells (got my money back) and i guess they are ~1000mAh

[myhken]

@poster

@myhken

Actual mAh after charge - discharge - charge test on Opus BT-C3100 and LiitoKala Lii500 was 2200 and 2300 mAh.

i am the new owner of 2x lii-500 from Ali Express (~$24)

and would like to confer with other owners of the lii-500

how low does your lii-500 discharge before charging and to how high

i need more time with mine
i see 3.50v on the discharge
and 4.21v - 4.22v for the full charge

i started a mini review of the lii-500

BTW once i bought x…FIRE cells (got my money back) and i guess they are ~1000mAh

My discharge down to 3V and charge up to 4.20-4.21V. So if your stops at 3.5V, something is not right.

[poster]

@myhken

My discharge down to 3V and charge up to 4.20-4.21V. So if your stops at 3.5V, something is not right.

i might have missed end of the discharge i need more time with it

[SIGShooter]

@poster

@myhken

My discharge down to 3V and charge up to 4.20-4.21V. So if your stops at 3.5V, something is not right.

i might have missed end of the discharge i need more time with it

If you are seeing 3.5v after the battery has had time to rest than that is normal. And we’re only talking several minutes as opposed to hours.

[poster]

both of my lii-500 discharge to 2.82v exactly and then go in to a charge cycle
that is with new Sanyo NCR18650BF
i am now charging 1 at 500ma
and 1 at 1amp

so to fully understand this since in theory i can go down to 2.5v (i probably never will) i will never see 3400mAh as the end charge because it only started at 2.82v and in its best guesstimate it (should) display less then 3400mAh

[zhuyayun1 (zhuyayun1@foxmail.com)]

And amazon?

[Tinderbox_UK]

Simple rule of thumb, If it`s got FIRE in the name of the cell, dont buy it unless you are 100% certain they are not fake, there are lots of other brands.

Also other CPF member from Norway or EU, Should be able to supply you with some local reputable seller that they have used in the past.

John.

[crz6662]

One of the 1st lessons learned here was don’t buy a battery with the word fire in it. Still holds true…

[Lexel]

you can find Samsung, Sanyo, LG, Panasonic and Sony cells for are decent price without running into fakes

But buying batteries on Ebay from strange sellers you run too often into fakes

In general over 99.9% of those cheap fire cells are fake if they are rated above 3500mAh

I bought plenty of cells over Banggood and Gearbest and they are all 100% original

there are way over hundered cell types tested on this website from HKJ
http://lygte-info.dk/review/batteries2012/Common18650comparator.php

you can see how good the cells are

Samsung 18650-30Q are great cells and relatively cheap